CFP calculation system and CFP calculation method

Abstract

To provide a CFP calculation system that can calculate CFP of a product by taking into account energy used in design and manufacturing processes.SOLUTION: A CFP calculation system 10 includes: an information acquisition unit 41 configured to acquire the amount of energy consumed in design and manufacturing processes of a product and energy source information; a CFP calculation unit 42 configured to calculate an energy consumption amount for each product based on the energy source information and energy consumption amount of each of energy consumed in a design facility in which design work is performed in the design process and energy consumed in a manufacturing facility in which the product is manufactured in the manufacturing process, and calculate CFP of the product for each prescribed unit by multiplying the total sum of the energy consumption amounts for each product by a coefficient unique to the energy source; and an output unit 43 configured to output information pertaining to the CFP of the product based on the energy source information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a CFP calculation system and a CFP calculation method. [Background technology]

[0002] In recent years, there has been a demand to reduce greenhouse gas emissions at factories and other facilities. Companies have begun to show their carbon footprint (CFP), which is the result of converting the greenhouse gas emissions emitted at each stage of a product's life cycle, from development, manufacturing, distribution, use, and disposal, into carbon dioxide emissions. In addition, a system that reduces greenhouse gas emissions to zero overall is called carbon neutral.

[0003] To achieve carbon neutrality, it is important to promote greenhouse gas emissions reductions not only through the efforts of individual companies but also throughout the entire supply chain. For this reason, it is necessary to create a market in which carbon-neutral products are chosen by consumers.

[0004] As a prerequisite for creating such a market, a system for visualizing CFP calculated on a product-by-product basis is essential. However, conventional technology has not provided sufficient mechanisms for visualizing CFP. As there is a global trend toward making CFP reporting mandatory, a system for visualizing CFP has been required.

[0005] Patent Document 1 states, "In a manufacturing process for a product or part (including a manufacturing process using recycled parts) that can selectively use multiple types of electricity generated using different power generation methods, the information processing system creates and stores usage history information on the type of electricity used for machine tools, conveyance machinery, transport vehicles, etc. that were actually used in each process from manufacturing to recycling, and calculates the amount of CO2 emissions emitted directly or indirectly in the manufacturing of each product or part based on the stored usage history information. Furthermore, in cases where an electricity type can be selected for each manufacturing sub-process included in the manufacturing process, the information processing system creates and stores usage history information that indicates which electricity type was selected and used at what time period for each manufacturing sub-process, and calculates the CO2 emissions for the entire process, the manufacturing process, or each manufacturing sub-process based on this usage history information." [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7203063 Summary of the Invention [Problem to be solved by the invention]

[0007] In the production of industrial products, in addition to the production equipment, energy is also consumed to maintain air conditioning, lighting, passageways, storage facilities, etc. around the production equipment that do not directly contribute to the processing of the product. However, the technology disclosed in Patent Document 1 did not take into consideration how to allocate greenhouse gas emissions resulting from energy consumption in areas that do not directly contribute to the processing of the product as emissions during the manufacturing of the product.

[0008] Furthermore, greenhouse gases are generated during the development stage before mass production of a product, as energy is consumed during that stage. Therefore, greenhouse gas emissions generated during the development stage should also be allocated proportionally to the mass-produced product. However, the technology disclosed in Patent Document 1 did not have a mechanism for allocating greenhouse gas emissions generated during the development stage to the mass-produced product.

[0009] The present invention has been made in view of the above circumstances, and aims to make it possible to calculate the CFP of a product taking into account the energy used in the design and manufacturing processes. [Means for solving the problem]

[0010] The CFP calculation system of the present invention comprises an information acquisition unit that acquires the amount of energy consumed in the design and manufacturing processes of a product during its life cycle, as well as information on the energy source of the energy; a CFP calculation unit that calculates the energy consumption for each product based on the energy source information and energy consumption of the energy consumed in the design facility where design work is carried out in the design process and the energy consumed in the manufacturing facility where the product is manufactured in the manufacturing process, and multiplies the total energy consumption for each product by a coefficient specific to the energy source to calculate the CFP of the product for each specified unit; and an output unit that outputs information on the CFP of the product based on the energy source information. [Effects of the Invention]

[0011] According to the present invention, it is possible to calculate the CFP for each product taking into account the energy used in the design process and manufacturing process. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing an example of the overall configuration of a CFP calculation system according to one embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing an example of the internal configuration of a design and manufacturing CFP calculation unit according to one embodiment of the present invention. [Figure 3] 1 is a block diagram illustrating an example of a hardware configuration of a computer according to an embodiment of the present invention. [Figure 4] 1 is a flowchart illustrating an example of a method for calculating a product CFP according to one embodiment of the present invention. [Figure 5]FIG. 10 is a diagram illustrating an example of the configuration of a performance table according to an embodiment of the present invention. [Figure 6] FIG. 1 is a diagram showing an overview of a function for calculating a CFP according to an embodiment of the present invention. [Figure 7] 3A to 3C are diagrams illustrating examples of the configuration of an order table, an order details table, and a production table according to an embodiment of the present invention. [Figure 8] 3A to 3C are diagrams illustrating examples of configurations of a power management table, a process management table, and a performance management table according to an embodiment of the present invention. [Figure 9] FIG. 1 is a layout diagram of an office according to an embodiment of the present invention. [Figure 10] 10A and 10B are diagrams illustrating configuration examples of a facility worker number management table and a product design worker number management table according to an embodiment of the present invention. [Figure 11] 3A to 3C are diagrams illustrating examples of the configuration of an attendance registration table, a work number definition table, and a work location management table according to an embodiment of the present invention. [Figure 12] FIG. 10 is a diagram showing an example of attendance management registration according to an embodiment of the present invention. [Figure 13] 1 is a power distribution route diagram illustrating an example of a power network in a factory according to an embodiment of the present invention. [Figure 14] 1 is a diagram showing an example of a facility in a factory in which a manufacturing apparatus according to an embodiment of the present invention is installed; [Figure 15] 10A to 10C are diagrams illustrating configuration examples of a power supply source management table, a manufacturing equipment power distribution path connection destination management table, an equipment occupancy rate allocation table, and a facility maintenance power consumption record table according to an embodiment of the present invention. [Figure 16] FIG. 1 is a diagram illustrating an example of a process from the arrival of parts to the shipment of a product according to an embodiment of the present invention. [Figure 17] FIG. 2 is a diagram showing an example of a CFP calculation table used in a CFP calculation according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functions or configurations are designated by the same reference numerals, and redundant description will be omitted.

[0014] [One embodiment] FIG. 1 is a diagram showing an example of the overall configuration of a CFP calculation system 10 according to an embodiment. The CFP calculation system 10 includes a management system 1, an information providing unit 3, and a design and manufacturing CFP calculation unit 4.

[0015] Management system 1 is a system used mainly by suppliers that provide product parts and raw materials to companies. Suppliers manage parts, raw materials, etc. through common platform 2. Common platform 2 has a portal site, authentication function, ID management function, hub function, etc., and manages access for each supplier. Common platform 2 also manages information on raw materials, parts, etc. registered by suppliers. The common platform 2 is used by a company (supplier) different from the company that uses the information providing unit 3 and the design and manufacturing CFP calculation unit 4 according to this embodiment.

[0016] Information output from the management system 1 is input to an information provider 3 that provides LCA (Life Cycle Assessment) solutions to customers. LCA is the evaluation or assessment of the life cycle of an industrial product or service, from its creation to the end of its useful life.

[0017] The information providing unit 3 acquires necessary information from the common platform 2. The information providing unit 3 includes a procurement CFP calculation unit 31, an overall CFP calculation unit 32, and a CFP report creation unit 33.

[0018] The procurement CFP calculation unit 31 calculates the CFP in the procurement process of procuring raw materials, parts, etc. from suppliers as the "procurement CFP." The procurement CFP represents emissions in the entire supply chain excluding companies that use the CFP calculation system 10 according to this embodiment. The entire supply chain includes not only procurement, design, and manufacturing as shown in Figure 1, but also distribution and sales. In other words, the Procurement CFP covers the upstream processes of the supply chain (manufacturing of raw materials, commuting of employees of other companies, transportation and distribution of raw materials) and downstream processes (use of products by users, disposal of products).

[0019] The procurement CFP calculation unit 31 acquires various BOM and purchasing information and calculates the procurement CFP. BOM is an abbreviation for "Bill of Materials" and is also called "Bill of Materials" or "Bill of Materials Configuration." It is basic information for understanding the parts information required to manufacture products and parts in the manufacturing industry and the configuration of the product.

[0020] The total CFP calculation unit 32 acquires information necessary for calculating the total CFP (product CFP, described later) from the design and manufacturing CFP calculation unit 4 according to this embodiment. The total CFP calculated by the total CFP calculation unit 32 is output to the CFP report creation unit 33.

[0021] In order for a carbon dioxide-free product (referred to as "product") to be selected and distributed, the CFP must be calculated for each product. The production of a product requires a design process and a manufacturing process, and each process involves the direct and indirect emission of greenhouse gases. For this reason, a design and manufacturing CFP calculation unit 4 is provided that can calculate the amount of greenhouse gases emitted in the design and manufacturing processes and calculate the CFP for each product.

[0022] Here, the general configuration of the design and manufacturing CFP calculation unit 4 will be described. The design and manufacturing CFP calculation unit 4 is constructed on an on-premise server within a company, a cloud server, or the like. This design and manufacturing CFP calculation unit 4 calculates the CFP for the product design process and manufacturing process. The floor area of ​​an office is divided into sections A to C to identify where designers are located. Similarly, the floor area of ​​a factory is divided into sections D to F to identify where robots are used.

[0023] The design process represents a process in the product development stage. During the design process, for example, a designer such as an engineer in an office designs a product using a PC (Personal Computer) or the like. Therefore, the design and manufacturing CFP calculation unit 4 calculates the CFP of the design process based on the floor area ratio of the office where the engineer engaged in design is located and the power used in the office (e.g., 1000 kWh). At this time, the design and manufacturing CFP calculation unit 4 also takes into account the product design period so that it can calculate the CFP of the design process for each product (model name).

[0024] The design and manufacturing CFP calculation unit 4 calculates the CFP for each process by considering fuel combustion in factories, electricity consumption in factories and offices, etc. as energy consumption. For example, the design and manufacturing CFP calculation unit 4 calculates the CFP for the design process by apportioning the power consumption of the office by the occupied area of ​​the office occupied by the designer of each product and the design period, and multiplying it by the coefficient of the energy source.

[0025] In the manufacturing process, for example, robots on a production line in a factory where the production line is installed manufacture products. The floor area of ​​the factory where the robots are installed also needs to be taken into consideration. For example, if robots 1, 2, and 3 are installed in a factory, the number of robots used will differ for each product model. The required floor area will also differ depending on the number and size of the robots installed in the factory. For this reason, the design and manufacturing CFP calculation unit 4 calculates the CFP of the manufacturing process for each product as the CFP of the robots and the CFP apportioned by the floor area of ​​the factory.

[0026] For example, the design and manufacturing CFP calculation unit 4 allocates the power consumption of each manufacturing device on the production line proportionally based on the product's work time (ST) and the number of units produced. Then, the design and manufacturing CFP calculation unit 4 calculates the sum of the CFPs obtained by multiplying the power consumption of each manufacturing device by the coefficient of the energy source. Furthermore, the design and manufacturing CFP calculation unit 4 divides the factory's power consumption proportionally by the floor area occupied by each product, and calculates the sum of the CFPs obtained by multiplying the factory's power consumption by the coefficient of the energy source.The design and manufacturing CFP calculation unit 4 then calculates the total sum of these CFPs as the CFP of the manufacturing process.

[0027] Thereafter, the design and manufacturing CFP calculation unit 4 sums up the CFP of the design process and the CFP of the manufacturing process, and the sum is regarded as the CFP of each product in the company. After calculating the CFP of each product, the design and manufacturing CFP calculation unit 4 outputs this information to the total CFP calculation unit 32. Note that the information that the design and manufacturing CFP calculation unit 4 outputs to the total CFP calculation unit 32 includes product-specific information such as the product and lot number, and information on greenhouse gas emissions in the manufacturing process such as the CFP value. Note that in the following explanation, products are identified by their model name.

[0028] The CFP report creation unit 33 creates a CFP report based on the total CFP calculated by the total CFP calculation unit 32, and provides the CFP report (not shown) to the client.

[0029] FIG. 2 is a block diagram showing an example of the internal configuration of the design and manufacturing CFP calculation unit 4. As shown in FIG. The design and manufacturing CFP calculation unit 4 includes an information acquisition unit 41, a CFP calculation unit 42, an output unit 43, and a table Tx.

[0030] The information acquisition unit 41 acquires the amount of energy consumed in the design process and manufacturing process of a product during its life cycle, as well as information on the energy source. For example, the information acquisition unit 41 acquires information on the energy sources, such as electricity and gas, used by the office used in the design process and the factory used in the manufacturing process. The information acquired by the information acquisition unit 41 is written to table Tx.

[0031] The CFP calculation unit 42 calculates the energy consumption for each product based on the energy source information and energy consumption amounts of energy consumed in a design facility (e.g., an office) where design work is performed in the design process and energy consumed in a manufacturing facility (e.g., a factory) where products are manufactured in the manufacturing process. The CFP calculation unit 42 calculates the energy consumption amount by considering electricity consumed in the design process as energy and at least one of electricity and gas consumed in the manufacturing process as energy.

[0032] Furthermore, the CFP calculation unit 42 acquires necessary information from table Tx. Table Tx is a general term for various tables used in the design and manufacturing CFP calculation unit 4, and is, for example, each of the tables shown in FIGS.

[0033] In the design process, greenhouse gas emissions and energy consumption are allocated proportionally according to the floor area of ​​the office.In the manufacturing process, greenhouse gas emissions and energy consumption are allocated proportionally according to the robots used on the production line, the model names of the products manufactured, and the floor area of ​​the factory. Then, the CFP calculation unit 42 apportions the amount of energy consumed in the design facility (for example, an office) based on the floor area ratio occupied by the product designers in the design facility and the design period for each product.

[0034] Furthermore, the CFP calculation unit 42 allocates the amount of energy consumed in a manufacturing facility (e.g., a factory) based on the number of products manufactured by the manufacturing equipment, the working time required for manufacturing, and the ratio of floor area occupied by the manufacturing equipment in the manufacturing facility.The CFP calculation unit 42 then calculates the energy consumption for each product by adding the allocated value of the amount of energy consumed in the design facility and the allocated value of the amount of energy consumed in the manufacturing facility.

[0035] The CFP calculation unit 42 calculates the sum of the energy consumption for each product and multiplies the sum by a coefficient specific to the energy source to calculate the CFP of the product for each specified unit. The CFP calculation unit 42 also obtains necessary information from table Tx. The CFP calculation unit 42 determines the CFP for the manufacturing process as the sum of the CFP calculated from the energy consumption of the energy consumed in the manufacturing process for each energy source identified from the energy source information.

[0036] The output unit 43 outputs CFP information for each product in a predetermined unit (abbreviated as product CFP) based on the energy source information. For example, the output unit 43 outputs the product CFP calculated by the CFP calculation unit 42 to the total CFP calculation unit 32 shown in FIG.

[0037] <Example of computer hardware configuration> Next, the hardware configuration of the computer 50 that constitutes each device of the design and manufacturing CFP calculation unit 4 will be described. 3 is a block diagram showing an example of the hardware configuration of the calculator 50. The calculator 50 is an example of hardware used as a computer operable as the design and manufacturing CFP calculation unit 4 according to this embodiment. The design and manufacturing CFP calculation unit 4 of this embodiment is configured by the calculator 50 (computer) executing a program to configure the functional blocks shown in Figure 2, and these functional blocks work together to realize the product CFP calculation method shown in Figure 4, which will be described later.

[0038] The computer 50 includes a CPU (Central Processing Unit) 51, a ROM (Read Only Memory) 52, and a RAM (Random Access Memory) 53, each connected to a bus 54. The computer 50 further includes a display device 55, an input device 56, a non-volatile storage 57, and a network interface 58.

[0039] The CPU 51 reads out program code of software that realizes each function according to this embodiment from the nonvolatile storage 57, loads it into the RAM 53, and executes it. The CPU 51 can also read out program code of software from a nonvolatile storage (not shown) connected to a network (not shown) via the network interface 58, load it into the RAM 53, and execute it. Variables, parameters, etc. generated during the calculation processing of the CPU 51 are temporarily written to the RAM 53, and these variables, parameters, etc. are read out by the CPU 51 as appropriate. The functions of the information acquisition unit 41, the CFP calculation unit 42, and the CFP calculation unit 43 shown in FIG. 2 are realized by the CPU 51.

[0040] The display device 55 is, for example, a liquid crystal display monitor, and displays to the user the results of processing performed by the computer 50. The input device 56 is, for example, a keyboard, a mouse, etc., and allows the user to input predetermined operations and give instructions. The display device 55 may display the CFP in the design process, the CFP in the manufacturing process, and the product CFP.

[0041] The nonvolatile storage 57 may be, for example, a hard disk drive (HDD), a solid state drive (SSD), a flexible disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, or a nonvolatile memory. In addition to an operating system (OS) and various parameters, programs for operating the computer 50 are recorded in the nonvolatile storage 57.

[0042] The nonvolatile storage 57 stores programs, data, and the like required for the operation of the CPU 51. That is, the nonvolatile storage 57 is used as an example of a computer-readable non-transitory storage medium that stores programs executed by the calculator 50. The nonvolatile storage 57 stores the table Tx shown in FIG. 2.

[0043] For example, a NIC (Network Interface Card) or the like is used as the network interface 58. The network interface 58 is capable of transmitting and receiving various data between devices via a LAN (Local Area Network), a dedicated line, or the like connected to a terminal of the NIC. The product CFP information output by the output unit 43 is provided to the total CFP calculation unit 32 shown in FIG. 1 via the network interface 58.

[0044] FIG. 4 is a flowchart showing an example of a method for calculating product CFP. First, the information acquisition unit 41 acquires information on energy sources used in offices and factories (S1). Next, the CFP calculation unit 42 calculates the amount of greenhouse gases emitted in the design process (S2). Next, the CFP calculation unit 42 calculates the amount of greenhouse gases emitted in the manufacturing process (S3). Next, the CFP calculation unit 42 finds the sum of the energy consumption for each product, and multiplies the sum by a coefficient specific to the energy source to calculate the CFP of the product for each specified unit (S4).

[0045] In this embodiment, the CFP of a product is calculated on a per-unit basis. However, the CFP of a product may also be calculated on a per-unit basis, such as a predetermined number of units or a lot basis. In this calculation, the CFP calculation unit 42 converts the amount of greenhouse gas emissions emitted in the design process into the CFP for the design process. The CFP calculation unit 42 also converts the amount of greenhouse gas emissions emitted in the manufacturing process into the CFP for the manufacturing process.

[0046] Finally, the output unit 43 outputs the product CFP to the total CFP calculation unit 32 of the information providing unit 3 (S5), and this process ends.

[0047] FIG. 5 is a diagram showing an example of the configuration of a performance table T1. Performance table T1 shows the production performance of robots for each product model name, as well as examples of factory and office floor areas. The aggregation period for the work hours and production numbers of the products shown in this table is one month. The robot is an example of manufacturing equipment such as FA (Factory Automation) equipment.

[0048] As mentioned above, CFP needs to be calculated on a product-by-product basis. Items required to calculate CFP on a product-by-product basis include the power consumption of the factory, office, and manufacturing equipment, as well as information related to the allocation rate of each product, such as floor area, working hours (ST: Standard Time), and number of units produced. Therefore, the input information required for a company to calculate its own carbon footprint on a product-by-product basis is, for example, information related to the power consumption and the allocation rate of each product. Note that the office-by-office basis includes the floors and rooms of companies involved in the design.

[0049] The energy source for the power consumption may be electricity, fossil fuels (including gas), biomass fuels, etc. Power consumption can be measured on a factory, office, or manufacturing equipment basis. Therefore, the information acquisition unit 41 shown in FIG. 2 can acquire power consumption information on a factory or office basis by collecting information measured by smart meters installed in the factory or office. The information acquisition unit 41 can also acquire power consumption information directly from manufacturing equipment and devices.

[0050] Additionally, the design and manufacturing CFP calculation unit 4 acquires information related to the allocation rate of each product, such as the floor area of ​​the office or factory, work time (ST), and number of units produced. The floor area represents the area used to manufacture each product. The work time (ST) represents the time required to work on each product. The number of units produced represents the number of products produced per certain period (e.g., week / month / year).

[0051] In product manufacturing, multiple products with different model names are manufactured in different production quantities. The manufacturing equipment used in each manufacturing process manufactures products with different working times (ST) and production quantities for each product and each process. Therefore, electricity is consumed in factories and offices related to the manufacturing. For this reason, the power consumption acquired by the information acquisition unit 41 needs to be apportioned based on the working time (ST), production quantity, and floor area.

[0052] Here, with reference to FIG. 5, a specific example of the process in which the design and manufacturing CFP calculation unit 4 calculates the CFP for each product will be described. For example, the vertical column on the left side of the table shown in Figure 5 shows product model names A, B, and C. In the following explanation, when model name A is referred to, it refers to the product with model name A. The horizontal columns of the table show robots 1, 2, and 3, as well as the area of ​​the factory and office. The power consumption of robot 1 is 100 kWh, that of robot 2 is 200 kWh, and that of robot 3 is 300 kWh. The power consumption of the factory is 900 kWh, and that of the office is 1000 kWh.

[0053] The work time (ST) for robot 1 per product of model A is 40 seconds, and the number produced is 28,800. On the other hand, the work time (ST) for robot 1 per product of model B is 50 seconds, and the number produced is 11,520. For robots 2 and 3, the work time (ST) and number produced are also calculated for each product model.

[0054] The area of ​​the area used for manufacturing products Type A and Type B is 250m for both the factory and the office. 2 The area required for manufacturing Type C products is 500m² for both the factory and the office. 2 is.

[0055] The CFP calculation unit 42 shown in FIG. 2 calculates the power consumption of the product with the model name A using the following formula (1). Power consumption of model A = Power consumption by robots (FA equipment) + power consumption by factories + power consumption by offices = (power used by robot 1 with a power consumption of 100 kWh to manufacture one model A) + (power used by robot 2 with a power consumption of 200 kWh to manufacture one model A) + (total power consumption for lighting, air conditioning, etc. in the area used to manufacture model A) + (total power consumption for lighting, air conditioning, etc. in the office used to design model A) ... (1)

[0056] When specific numerical values ​​are substituted into formula (1), the CFP calculation unit 42 shown in FIG. 2 calculates the power consumption of model A as follows:

[0057] Power consumption of model A =100 / (40×28,800+50×11,520)×40 +200 / (20×28,800+75×11,520+30×9,600)×20 +(250×900 / 1000) / 28,800 +(250×1000 / 1000) / 28,800 =0.002+0.002+0.008+0.009 =0.021kwh

[0058] Furthermore, the CFP calculation unit 42 calculates the CFP of the type name A using the following formula (2). CFP calculated for manufacturing one product model = {(the apportioned value and sum of the power consumption of the manufacturing equipment used in the product manufacturing) + (proportional value of power consumption for factory lighting, air conditioning, etc.) + (Apportioned value of office power consumption) × Coefficient for each energy source … (2)

[0059] The apportioned value of the power consumption of the manufacturing equipment, factory, and office shown in formula (2) is 0.021 kWh, calculated by applying specific values ​​to formula (1). Also, with regard to the apportioned value of the office power consumption in formula (2), if cloud application software and databases are used in the office, the product CFP is calculated taking into account the power consumption of the cloud as well as the location of the designer.

[0060] If the CFP converted from greenhouse gases emitted in the manufacture of a product of one model name is taken as the CFP of model name A, the CFP calculation unit 42 calculates the CFP of model name A using the following formula (3): Formula (3) is a formula assuming the case where only purchased electricity is used as the energy source.

[0061] CFP with model name A = Power consumption of model A × Coefficient (for example, the CO2 emission coefficient for fiscal year 2022 announced by XXX Electric Power) … (3)

[0062] By substituting specific numerical values ​​into equation (3), the CFP calculation unit 42 calculates the CFP of the type name A as follows. CFP with model name A =0.021kWh×0.376kg-CO2 / kWh =0.008kg-CO2

[0063] Here, the CFP calculated when multiple energy sources are used will be explained using a more detailed formula. FIG. 6 is a diagram showing an outline of the function of the CFP calculation unit 42 to calculate the CFP based on information on a plurality of energy sources.

[0064] When energy sources for manufacturing equipment, factories, and offices are mixed, CFP is calculated by adding together direct emissions and indirect emissions. Here, direct emissions are emissions calculated using the allocation value at the time of manufacturing and emission source information. These direct emissions represent greenhouse gas emissions generated by fuel consumption, such as when fuel used within a company is burned to obtain energy. Indirect emissions represent greenhouse gas emissions generated indirectly by other companies, such as when electricity purchased from other companies is consumed.

[0065] Direct emissions are greenhouse gas emissions resulting from, for example, burning gases. Direct emissions are high in factories during the process of burning gases to melt metal materials and pour them into molds. Indirect emissions are greenhouse gas emissions resulting from the consumption of electricity purchased from an electric power company, for example. In the process of polishing products removed from the mold, electricity purchased from an electric power company is consumed to operate the polishing equipment, resulting in high indirect emissions.

[0066] The design and manufacturing CFP calculation unit 4 calculates the direct emissions and indirect emissions using the allocation values ​​at the time of manufacturing, emission source information, etc. The product CFP calculated based on the calculated direct emissions and indirect emissions is output to the total CFP calculation unit 32 shown in Figure 1.

[0067] An example of the allocation table T2 is shown in the upper left of FIG. 6, and an example of the emission source information table T3 is shown in the upper right of FIG. Allocation table T2 has the following items: product number, product model name, allocation ratio (gas), and allocation ratio (electricity).

[0068] The product number field stores the product number for identifying the product. The product model name field stores the model name of each product. In the item of distribution ratio (gas), the gas distribution ratio (for model name A, distribution ratio X) is stored as the distribution ratio of energy consumed by the product. The allocation ratio (electricity) item stores the electricity allocation ratio (for model name A, allocation ratio L) as the allocation ratio of energy consumed by the product. The allocation ratio (gas) and allocation ratio (electricity) are values ​​that add up to 100%.

[0069] The emission source information table T3 has the following fields: number, emission source, and emission source unit. The number field stores a number for identifying the emission source. The emission source field stores the emission source. The emission source is gas in the case of number (1) and electricity in the case of number (2). In the case of number (n), although not shown, for example, hydrogen obtained from fossil energy is stored as the emission source. The item of emission source unit stores either α indicating direct emissions or β indicating indirect emissions.

[0070] The CFP calculation unit 42 refers to the allocation table T2 to obtain the ratio for each product between direct emission sources that directly emit greenhouse gases by directly consuming energy and indirect emission sources that indirectly emit greenhouse gases from energy supply companies by consuming energy purchased from the energy supply companies. Then, the CFP calculation unit 42 calculates the energy consumption for each product for each design process and manufacturing process based on the obtained ratio.

[0071] Furthermore, the CFP calculation unit 42 collects measured values ​​of power consumption in each process from the design process and manufacturing process, and calculates the CFP for each product by referring to the allocation table T2 and the emission source information table T3. In the design process, electricity is consumed mainly for lighting and air conditioning. In the assembly process, robots assemble parts 1 to N to manufacture products. Therefore, in the design process, gas is consumed to generate electricity to operate the robots, and electricity is also consumed for lighting and air conditioning used in the factory.

[0072] The CFP calculation unit 42 calculates the CFP of the type name A using the following formula (4). CFP with model name A = (direct emissions from the assembly process) + (indirect emissions from the design and assembly processes) = Emission source (gas) unit x allocation ratio (gas) + Emission source (electricity) unit x allocation ratio (electricity) =α×X+β×L …(4)

[0073] Similarly, the CFP calculation unit 42 calculates the CFP of the type name B using the following formula (5). CFP with model name B = (direct emissions from the assembly process) + (indirect emissions from the design and assembly processes) = Emission source (gas) unit x allocation ratio (gas) + Emission source (electricity) unit x allocation ratio (electricity) =α×Y+β×M …(5) In this way, the CFP calculation unit 42 can calculate the product CFP for each model name.

[0074] It should be noted that the calculation of CFP when multiple energy sources are used can be performed in more detail than the above formulas (4) and (5). For example, the CFP calculation unit 42 may use the following formula (6) to calculate the CFP calculated from greenhouse gases emitted in the production of type A when multiple energy sources are used (also abbreviated as "CFP of type A").

[0075] CFP calculated from greenhouse gases emitted in the production of Model A = Sum of CFPs emitted in the production of Model A, calculated for each energy source =1st term + 2nd term + 3rd term + 4th term + 5th term + 6th term + 7th term …(6)

[0076] The contents of the first to seventh terms of formula (6) are as follows. The "Σ" that appears in each of the following terms means that the calculation is for each power system during the production period of model A.

[0077] Term 1 = Σ {Power consumption of equipment used in the production of model A involving power system (n) × Emission coefficient of power system (n)} The first term includes both in-house generated and purchased electricity. The electricity consumed by manufacturing equipment is calculated using this first term. Note that even if the electricity is purchased from the same power company, if the emission coefficient changes from month to month, it is calculated separately.

[0078] 2nd term = Σ {power consumption consumed by the factory's power system (n) × emission coefficient of the power system (n) × apportioned value of model name A involved in the power system (n)} The second term is used to calculate the proportionate distribution of power consumption for lighting, air conditioning lighting, etc. used in the area occupied by manufacturing equipment of type A in the area of ​​the factory production line. The area occupied by manufacturing equipment of type A includes not only the area where the manufacturing equipment is installed, but also the surrounding work area required around the manufacturing equipment.

[0079] Term 3 = Σ {Power consumption of office power system (n) × Emission coefficient (n) of power system (n) × Allocation value of model name A} The third term is used to calculate the power consumption of offices that are not directly involved in product production, such as the production management department and general affairs department, but contribute to maintaining the factory. In the third term, the power consumption is calculated by apportioning it to the production of model A among all product production.

[0080] Item 4 = Proportional value related to CFP x Model A in cloud services used during production The fourth term is used when cloud services are used in product production. Examples of cloud services include SaaS (Software as a Service), PaaS (Platform as a Service), and IaaS (Infrastructure as a Service). In the fourth term, the CFP for the production period of model name A is calculated by apportioning it based on the ratio related to model name A. For cloud services, the cloud service CFP published by the cloud service provider is used.

[0081] Term 5 = Σ {Thermal energy source (j) consumed by manufacturing equipment used in the production of model A × emission coefficient for thermal energy source (j)} The fifth term is used in calculations that assume, for example, that the casting process of an engine block is carried out using combustible gases. This calculation makes it possible to calculate CFP based not only on electricity but also on the greenhouse gases emitted by burning combustible gases.

[0082] Term 6 = Σ {Thermal energy source (j) used for factory air conditioning, etc. × Emission coefficient for thermal energy source (j) × Apportioned value of model name A involving thermal energy source (j)} Term 6 is used in the calculation of Type A when thermal energy obtained from fuel is used for air conditioning within a factory. Term 6 makes it possible to calculate CFP even when, for example, thermal energy emitted by other companies adjacent to the factory is obtained in the form of water vapor, etc.

[0083] Term 7 = Σ {Energy consumption of thermal energy source (j) used in the office × Emission coefficient (i) of energy source (j) × Allocated value of model name A} Item 7 is used to calculate the thermal energy consumption attributable to offices that are not directly involved in product production, such as the production management department and general affairs department, but contribute to maintaining the factory. Item 7 calculates the CFP associated with thermal energy consumption by apportioning it to the production portion of model A in the production of all products.

[0084] Next, the process of registering the product CFP calculated by the CFP calculation unit 42 in FIG. 2 as a CFP performance in the production table T13 will be described with reference to FIGS. FIG. 7 is a diagram showing an example of the configuration of the order table T11, the order details table T12, and the production table T13.

[0085] The order table T11 is a table for managing product orders from customers. The order table T11 has fields for order number, order detail number, and product model name. The order number field stores the order number that identifies the product model name ordered by the customer. The order detail number field stores the order detail number that identifies the order detail linked to the order number. The order detail number is created by adding a subnumber to the order number. The product model name field stores the model name of the product specified by the order number and order detail number.

[0086] The order details table T12 is a table for managing order details, and has the following fields: order detail number, order quantity, product model name, and serial number. The order detail number field stores the order detail number stored in the order table T11. The order quantity field stores the ordered quantity of the ordered product model. The product model name field stores the ordered product model. The serial number field stores the serial number of the product model. As indicated by the arrow in the figure, the order detail number in the order table T11 is used as a key to identify the production number in the order detail table T12.

[0087] The production table T13 is a table for managing the production of products identified by product model names. Information on each item stored in the production table T13 (information on items other than the production status) is passed to the total CFP calculation unit 32 shown in Fig. 1. This production table T13 has the following items: serial number, input quantity, production status, actual number of non-defective items, and actual CFP value / unit quantity.

[0088] The serial number field stores the serial number stored in the order details table T12. The input quantity field stores the input quantity of the product identified by the product model name. The input quantity is greater than the order quantity in the order details table T12 because more products than the ordered quantity are manufactured, taking into account past yields, etc. The production status field stores the production status of the product identified by the product model name. If production has finished, "Complete" is stored, and if process 3 is in progress, "Process 3" is stored.

[0089] The "Actual number of conforming products" field stores the actual number of conforming products for the product identified by the product model name. The input quantity and the actual number of conforming products are set to the same value, but there are cases where the actual number of conforming products is lower. The value stored in the "Actual number of conforming products" field is the same as the "Production quantity" field for model name A in the performance table T1 in Figure 5.

[0090] The CFP value / unit quantity actual item registers the CFP actual for each manufacturing process, the prorated value of the CFP actual resulting from air conditioning, lighting, etc. based on the area ratio of each manufacturing process device in the factory, and the total of the CFP actual for the design process. This CFP actual is the product CFP value calculated for each product. The CFP value / unit quantity actual is included in the CFP report created by the CFP report creation unit 33. As shown by the arrow in Figure 7, the CFP value / unit quantity actual in the production table T13 can be referenced using the serial number in the order detail table T12 as a key.

[0091] The CFP calculation unit 42 calculates the total energy consumption for each energy source and for each applicable period, and calculates the CFP of the product by multiplying the total energy consumed during the applicable period by the coefficient applied to the applicable period. Here, an example of calculating the energy source of the energy consumed in the manufacturing process, the applicable period of the emission coefficient, and the amount of electricity used, which is the energy consumed by each manufacturing device, will be described with reference to FIG.

[0092] FIG. 8 shows examples of the configuration of the power management table T14, the process management table T15, and the performance management table T16. The power supply management table T14 is a table for managing the power supplies used in the design and manufacturing processes. The power supply management table T14 has fields for the power supply management number, the power company or power supply name, the emission coefficient, the application start date, and the application end date.

[0093] The power supply control number field stores a power supply control number that can identify each power supply. The power company or power supply name field stores the name of the power company or the type of power supply. The emission factor field stores a pre-calculated emission factor. Note that the emission factor for private power generation (solar power) is 0.

[0094] The start date of application of the emission factor is stored in the application start field. The end date of application of the emission factor is stored in the application end field. By storing the application start date and application end date, even if the emission coefficient is changed across months, the greenhouse gas emissions can be calculated correctly based on the performance management table T16.

[0095] Here, the procedure for calculating the CFP by the CFP calculation unit 42 will be described. First, the CFP calculation unit 42 tallyes the total amount of power used by each manufacturing device for each product serial number (see production table T13 in Figure 7) for each power source. Next, the CFP calculation unit 42 calculates the CFP for each power source by referencing the emission coefficient for each applicable period. The calculated CFP value is registered in the CFP value / unit quantity actuals field in the production table T13 in Figure 7.

[0096] The process management table T15 is a table for managing processes for each product model name, and has the following fields: product model name, process number, process management number, equipment number, and work procedure or recipe number.

[0097] The product model name field stores the model name of each product. In this case, model name A is stored. The process number field stores the order in which the work is to be started as a process number. If the order in which the work is to be started differs depending on the product model name, the process number will also change. The item "process control number" stores a process control number for managing which manufacturing equipment is installed in which area and which product is processed by which manufacturing equipment.

[0098] The equipment number field stores an equipment number for identifying a manufacturing equipment used in a process managed by a process number and a process management number. The item of work procedure or recipe number stores a work procedure or recipe number, which is a management number indicating a processing recipe or the like of a manufacturing device.

[0099] The performance management table T16 is a table for managing the production performance of a product. The performance management table T16 has the following fields: production number, process control number, work instruction number, status, number of starts, number of completions, start time, end time, and power consumption.

[0100] The serial number field stores the serial number shown in the production table T13 in Fig. 7. The process control number field stores the process control number in the process control table T15. The work instruction number field stores the work instruction number for identifying the work instruction given by the operator. The status field stores the status indicating the work status for each process managed by the process management number. In Figure 8, the status of all process control numbers is "Complete."

[0101] The item "Number of Starts" stores the number of starts, which indicates when production of the product has started. The item "Number Completed" stores the number of completions, which indicates when production of the product has been completed. In Figure 8, the number of starts and the number of completions are the same for a serial number with a status of "Completed."

[0102] The start time field stores the start time when production started. The end time field stores the end time when production finished. The power consumption field stores the amount of power consumed by each process managed by a process control number.

[0103] In the manufacturing process of the manufacturing number (MP100001) shown in the performance management table T16, for example, manufacturing is performed using a manufacturing device with a device number (MNF0001) linked to the process management number (PR0001). When the work specified by work instruction number (WK0000001) is completed, production will begin using the manufacturing equipment with equipment number (MNF0002). Therefore, the manufacturing equipment with equipment number (MNF0001) will be used in the manufacturing process with serial number (MP100002).

[0104] As shown in the process management table T15, the manufacturing equipment identified by the equipment numbers (MNF0001, MNF0002) used in the production of model A is used in a process identified by the process management numbers (PR0001, PR0002). At this time, the amount of power used is shown in the performance management table T16. Therefore, when calculating the CFP for each product, the CFP calculation unit 42 refers to the power management table T14 to confirm the application period of the emission coefficient, and also refers to the start time and end time in the performance management table T16. Then, when the CFP calculation unit 42 obtains the amount of power used for the product of the model name manufactured within the application period, it can multiply this amount of power used by the emission coefficient to calculate the CFP for each product.

[0105] <Calculation method for CFP in the design process> Here, the details of the method by which the CFP calculation unit 42 calculates the CFP for the design process and the CFP for the manufacturing process will be explained in order. First, the method for calculating the CFP for the design process, employees engaged in product development in the office, and the power used in the office will be explained with reference to Figs. 9 to 12.

[0106] First, we will explain how to calculate CFP in the product design process. The CFP for the design period for one product is called the design period CFP per product, and is calculated using the following formula (7). The specified number in formula (7) represents the multiplication of the product quantity equivalent to the cost depreciation. CFP: design period per product = (Designer-dependent CFP + Design environment-dependent CFP + Prototype-dependent CFP) ÷ Specified number … (7)

[0107] The designer-dependent CFP in equation (7) is calculated according to the following two calculation methods (A) and (B). Calculation method (A) is a method of calculating designer-dependent CFP by providing a table for managing the number of product designers. Calculation method (B) is a method that links with the employee attendance management system and calculates the designer-dependent CFP using the occupied area ratio at the time of design. The details of calculation methods (A) and (B) will be described later.

[0108] Furthermore, the CFP due to the design environment in equation (7) is calculated corresponding to the following two design environments (A) and (B). Design environment (A) is a case where design resources in a cloud environment are used. In this case, the CFP calculation unit 42 calculates the CFP using a tool provided by a company that provides cloud services.

[0109] Design environment (B) is a case where design resources of an on-premise environment are used. In this case, the CFP calculation unit 42 refers to the equipment occupancy rate allocation table T33 in Fig. 15 (described later), extracts the power consumption for the design period for the "equipment number" of the server to be used, and calculates the CFP based on this power consumption. Note that the CFP can also be calculated by allocating it to other products used in the same period (dividing by the number of products).

[0110] The "CFP of prototype" included in formula (7) is calculated by multiplying the actual number of conforming products recorded in the production table T13 of FIG. 7 by the CFP value / actual unit quantity. The CFP value / unit quantity actual result is calculated by the CFP calculation unit 42 acquiring the manufacturing process (managed by the process control number) that is started when manufacturing a specific product (for example, model name A) based on the process control table T15 in Fig. 8. After that, the CFP value / unit quantity actual result is calculated by aggregating the serial number of the target product and the amount of power used in all processes in the actual result control table T16 in Fig. 8.

[0111] The CFP calculation unit 42 calculates the total CFP value by multiplying the amount of power used by the emission coefficient for each power source and the period of power use (see power supply management table T14 in FIG. 8).Then, the CFP calculation unit 42 calculates the CFP value for the production of one product by dividing the total CFP value by the actual number of non-defective products (production table T13).

[0112] <Designer-dependent CFP calculation method (A)> The designer-dependent CFP shown in formula (7) can be calculated by the CFP calculation unit 42 by providing a table for managing the number of product designers. Tables for managing the number of product designers include the facility worker number management table T21 and the product design employee number management table T22 shown in Fig. 10. An example of an office for calculating the designer-dependent CFP is shown in Fig. 9, and examples of the configuration of each table are shown in Fig. 10, to explain the details of the designer-dependent CFP calculation method (A).

[0113] Figure 9 shows the layout of the office. The office has been assigned the facility division number "ARE010." The floor area of ​​the office is divided into sections A to C to identify where the designers (here referred to as employees) are located. Sections A and B are equipped with desks and chairs that can accommodate up to four employees. Section C is equipped with desks and chairs that can accommodate up to eight employees. Therefore, a maximum of 16 employees can work in an office with the facility division number "ARE010."

[0114] FIG. 10 is a diagram showing an example of the structure of the facility employee number management table T21 and the product design employee number management table T22. The facility employee headcount management table T21 is a table that manages the number of employees available to work for each facility, i.e., for each facility classification number, as the employee headcount. The facility employee headcount management table T21 has the following fields: facility classification number, employee headcount, application start date, and application end date.

[0115] The facility category number field stores the facility category number. The number of employees in the office classified by facility classification number is stored in the number of employees. The start of application field stores the start date of application of the designer-dependent CFP calculation. The application end item stores the application end date of the designer-dependent CFP calculation.

[0116] The facility employee number management table T21 shows, for example, that an office with facility classification number "ARE010" will have 15 employees working there from January 1 to August 31, 2023, and 16 employees working there from September 1 onwards.

[0117] The product design employee number management table T22 is a table that manages the number of employees engaged in design for each product, that is, for each product model name, as the number of design employees. The product design employee number management table T22 allocates the power consumption for each product model name, application start date, application end date, and facility classification number by dividing the number of design employees by the number of employees, and the calculation is performed for each application period (from the application start date to the application end date) of the product design employee number management table T22. It has a field for number of employees.

[0118] The product model name field stores the model name of the product that is the subject of the design. The application start field stores the application start date of the designer-dependent CFP calculation. The application end item stores the application end date of the designer-dependent CFP calculation. The number of employees engaged in design is stored in the number of employees engaged in design.

[0119] Product design employee number management table T22 indicates that the design of product model A will be carried out by two employees from April 1 to May 15, 2023, and by four employees from May 16 to June 30, 2023.

[0120] The CFP calculation unit 42 refers to a facility worker number management table T21, which manages the number of workers available to work on product design for each design facility, and a product design worker number management table T22, which manages the number of design workers engaged in design for each product, and allocates the energy consumption of the design facility based on the value obtained by dividing the number of workers by the number of employees. For example, the CFP calculation unit 42 can correctly calculate the amount of power used by employees engaged in design during design by apportioning the power consumption for each facility, i.e., for each facility classification number, by dividing the number of people engaged in design by the number of employees. The process of apportioning the power consumption for each facility classification number by dividing the number of people engaged in design by the number of employees is calculated for each application period (from the start of application to the end of application) of the product design employee number management table T22.

[0121] <Designer-dependent CFP calculation method (B)> The designer-dependent CFP shown in formula (7) can also be calculated by linking with an employee attendance management system and using the occupied area ratio at the time of design. In the designer-dependent CFP calculation method (B), the number of workers is managed for each facility classification number using the facility worker number management table T21 in Figure 10.

[0122] FIG. 11 shows examples of the configuration of the attendance registration table T23, the work number definition table T24, and the work location management table T25. The attendance registration table T23 is a table that manages the attendance status of each employee. The attendance registration table T23 has the following fields: employee ID, work date, clock-in, clock-out, direct: operation number, direct: man-hours, indirect operation, and indirect: man-hours. Here, "direct operation" refers to product development work. "Indirect operation" refers to work performed by the accounting or human resources department that supports the product development department, or work not directly related to the product, such as work performed by product development department personnel in meetings or training sessions.

[0123] The employee ID field stores the employee ID for identifying the employee. The work date field stores the work date on which the employee worked. The "Attend" field stores the time when an employee clocks in. The "Clock Out" field stores the time when an employee clocks out.

[0124] The Direct:Work Number field stores the work number that identifies which product the employee developed. The Direct:Work Hours field stores the work hours that the employee performed on the product development (direct work) specified in the Direct:Work Number field. The indirect work item stores the work number to identify the work classification such as training and meetings that are not related to product development. The indirect: man-hours item stores the indirect work man-hours performed by employees for the work classification specified in the indirect work item.

[0125] The attendance registration table T23 makes it possible to grasp the number of employees working for each applicable period based on the work number linked to the product design. In the designer-dependent CFP calculation method (B), the product design employee number management table T22 in Figure 10 is not required.

[0126] The power consumption for facility classification numbers is calculated on a monthly basis, but since design is generally carried out across multiple locations, it is necessary to confirm which facility classification employees are in each day during the target period. When calculating the total, emissions are calculated based on the number of man-hours required for each facility classification. Furthermore, in the CFP for the design process, only the number of man-hours required for work that contributes to product development is calculated. For this reason, the CFP calculation unit 42 can calculate the monthly power consumption for a facility classification number (e.g., ARE010) by apportioning it by the formula "target work man-hours" divided by "total man-hours required by employees." In this formula, workers refer to employees who directly performed the work. Total worker man-hours are the total man-hours of employees who worked in the target facility category. Target work man-hours are the daily work man-hours for each work number. Since power company emission factors are generally only updated monthly, electricity usage is tallied on a monthly basis.

[0127] The work number definition table T24 is a table that defines the work required for each product model name by work number. The work number definition table T24 has fields for work number and product model name. The work number field stores a work number for identifying the work required for product design. The product model name field stores the model name of the product being designed.

[0128] The work location management table T25 is a table that manages the work locations of employees. The work location management table T25 makes it clear who worked where and when. The work location management table T25 has fields for employee ID, facility category, and update date. The employee ID field stores the employee ID. The facility category field stores the facility category number. The update date field stores the update date of the work location management table T25.

[0129] The CFP calculation unit 42 refers to the attendance registration table T23, which manages the man-hours of design work performed by designers who design products for each product, and the work location management table T25, which manages the designers' work locations, and allocates the energy consumption of the design facility by the value obtained by dividing the man-hours of design work for each product by all work man-hours of workers. The man-hours are the total of direct work man-hours for each product model name identified from the attendance registration table T23 based on the work numbers linked to the product model names in the work number definition table T24. The total man-hours represent the total of all work man-hours at all work locations where the specified product development was carried out, including those of personnel unrelated to product development, such as the accounting department.

[0130] The CFP calculation unit 42 can calculate the energy consumption at the design facility of a specific product using the following equation (8). Energy consumption at the design facility for a specific product =Σ(energy consumption of the design facility where the designer of a specific product was located) × (total design man-hours of a specific product) ÷ (total work man-hours of all the people in the facility where the designer of a specific product was located) ... (8)

[0131] In formula (8), "total man-hours of all employees at a facility where a specific product designer was employed" refers to the man-hours including the total man-hours of employees in the human resources and accounting departments if they are also employed at the facility where the specific product designer is employed. Therefore, the man-hours of employees engaged in product design other than the specific product are also included in "total man-hours of all employees at a facility where a specific product designer was employed."

[0132] Product design may be carried out at multiple locations (for example, board design in Tokyo and software design in Osaka), which may require separate facility divisions. There may also be cases where employees work at multiple locations during the development period. However, while the configuration of each table shown in Figure 11 can accommodate work performed by different employees at different facility divisions, it does not assume that the same employee will work at different facility divisions.

[0133] Figure 12 is a diagram showing an example of attendance management registration. Attendance and work location are registered for each employee and displayed in a list format. From the top of Figure 12, the attendance records for employees 01, 02, and 03 for each power management period are registered. The power management period is set to a period, such as one day, during which the power source that supplies the electricity used by employees who design products is managed. Here, the power management period is set in the order of power management period (n-2), power management period (n-1), and power management period (n). For example, if you purchase electricity from a power company and the emission coefficient changes every month, January, February, and March correspond to power management period (n-2), power management period (n-1), and power management period (n). Therefore, power management period (n) represents the most recent period.

[0134] An example of attendance management registration makes it possible to clarify the total power used in work related to model name A during the power management period for each facility category where an employee worked on work related to model name A. Focusing on employee 01, the employee identified as employee 01 performed design work identified by work number PWK00001 across power management period (n-2) and power management period (n-1). This employee also performed design work identified by work number PWK00002 across power management period (n-1) and power management period (n). Furthermore, this employee performed design work identified by work number PWK00011 during power management period (n).

[0135] Similarly, the design work performed during each power management period is also clear for the employees identified as employee 02 and employee 03. It is also clear that the employees identified as employee 01 and employee 02 both performed design work in the office identified as facility category number ARE010, and the employee identified as employee 03 performed design work in the office identified as facility category number ARE011.

[0136] Using the attendance management registration example in Figure 12, for each facility management category used by an employee in the development of model name A, the monthly man-hours for model name A and the man-hours for all employees who used that facility management category can be calculated, and if the emission coefficient changes from month to month, the power used during the design period of model name A during that power management period can be clarified.

[0137] If an employee uses only one facility category, it is possible to calculate the total for each employee ("employee ID"). However, if one employee designs at multiple locations, the work hours for all work numbers related to model name A during the power management period must be calculated for each facility management category.

[0138] Here, the processing procedures (1) to (5) for greenhouse gas emissions for model name A in April 2023 will be explained with a specific example. In this example, the work number for model name A in April is PWK00001 and the facility classification (distinction of workplace) is ARE010 only. However, although not pointed out in the processing procedures explained below, in reality there may be multiple work numbers and facility classifications.

[0139] Processing procedure (1) Process to obtain the work number of model name A The CFP calculation unit 42 acquires PWK00001 and PWK0002 as the work numbers related to the design work of model name A from the work number definition table T24 shown in FIG.

[0140] Processing procedure (2) Identify the facility classification number for which the amount of emissions is to be calculated Next, the CFP calculation unit 42 refers to the attendance registration table T23 in Figure 11 to identify the employee who performed the work identified by the work number during the period for which greenhouse gas emissions are to be calculated (referred to as the target period). Then, it refers to the work location management table T25 in Figure 11 to obtain the facility classification used by the employee during the period in which the employee performed the work. The facility classification obtained at this time is "ARE010".

[0141] Processing procedure (3) Process to obtain all worker man-hours Next, the CFP calculation unit 42 references the attendance registration table T23 and the work location management table T25 in Figure 11 and obtains the work man-hours of all employees who used the facility type (ARE010) calculated in processing procedure (2) during the target period as the total worker man-hours. This process obtains, for example, the total work man-hours (unit: hours) used in the facility type (ARE010) in April.

[0142] Processing procedure (4) Process to obtain the target work man-hours Next, the CFP calculation unit 42 references the attendance registration table T23 in Figure 11 and obtains the facility type (ARE010) where employees worked each day from the work location management table T25 for employees who performed work with the corresponding operation number during the target period. It also obtains the total operation man-hours of employees who performed work with model name A for each facility type. Through this process, the facility type (ARE010) is used to directly obtain the total operation man-hours (unit: hour) for operation number PWK00001 as the target operation man-hours.

[0143] Processing step (5) Obtaining the emission factor In this process, the CFP calculation unit 42 identifies the power meter 71 connected to the facility category (ARE010) shown in the configuration diagram of FIG. 13, which will be described later. Therefore, the CFP calculation unit 42 then refers to the power supply source management table T31 in FIG. 15 to identify the power distribution route connected to the facility category (ARE010). Next, the CFP calculation unit 42 refers to the power supply management table T14 in FIG. 8 to obtain the emission coefficient of the power source connected to the facility category (ARE010) during the target period. After that, the greenhouse gas emissions for April are calculated using equation (9).

[0144] Emissions in April = (April power consumption of facility classification (ARE010)) × Emission coefficient for April × (target work man-hours ÷ total worker man-hours) … (9)

[0145] If an employee uses multiple facility management categories, the emissions for all facility categories during the relevant period will be calculated using the above series of calculations.

[0146] <Calculation method for CFP in manufacturing process> Next, a method for calculating CFP in the manufacturing process will be described in detail. Here, the relationship between the power grid in the factory and the power distribution equipment will be described with reference to FIGS.

[0147] Fig. 13 is a power distribution route diagram showing an example of a power grid within a factory. The left side of Fig. 13, divided by a dashed line, represents the power company's power transmission grid, and the right side represents the factory's power grid. Power of, for example, 6.6 kV to 154 kV is supplied to the factory from the power company via the power company's power transmission grid.

[0148] A power receiving point 61 in the factory power grid receives power transmitted from the power company's power transmission grid. The inflow of power is controlled by the opening and closing operation of a load switch 62. When the load is closed, power flows into a substation 63, and a potential transformer 64 transforms the high-voltage, high-current power into low-voltage, low-current power. As a result, the power distributed within the factory is reduced to approximately 0.6 kV to 6.6 kV. The route from this power receiving point 61 to the potential transformer 64 is managed by the power management number "PW001" shown in the power management table T14 in Figure 9.

[0149] Meanwhile, the power generated by the solar panel 65 flows into the power distribution facility 70 via the power conditioner 66. The power generated by the solar panel 65 can also be stored in the power storage facility 68. The solar panel 65 is managed by the power management number "PW003" shown in the power management table T14 of FIG. 9.

[0150] The power generated by the power generation equipment 67 also flows into the power distribution equipment 70. The power generated by the power generation equipment 67 can also be stored in the power storage equipment 68. The power generation equipment 67 is managed by the power management number "PW004" shown in the power management table T14 of FIG. 9. The power distribution equipment 70 includes a substation (not shown) and distributes power to each device in the factory. For example, a power distribution path is connected to the power distribution equipment 70, and power is distributed through this power distribution path. CPT001 to CPTXXX attached to the power distribution path represent the power distribution path number managed in a power supply source management table T31 in FIG. 15, which will be described later.

[0151] A power meter 71 is connected to a part of the power distribution route CPTXXX. The power meter 71 is a power meter that can collectively measure the power of air conditioning and the like used in a predefined area. Information on the power measured by the power meter 71 is acquired by the information acquisition unit 41 in FIG. 2.

[0152] In addition, since the power measurement of each manufacturing equipment is possible for the other routes of the power distribution route CPTXXX, no power meter 71 is connected. The equipment numbers for identifying the manufacturing equipment are managed in a manufacturing equipment power distribution route connection destination management table T32 in FIG. 15, which will be described later.

[0153] Although not shown, the power distribution routes CPT001 and CPT002 are also connected to a power meter 71, similar to the power distribution route CPTXXX, so that the power in a certain area can be measured and the power of each manufacturing device can be measured.

[0154] 14 is a diagram showing an example of a facility in a factory where manufacturing equipment is installed. In a factory, a plurality of divided areas are called a facility. The facilities within the factory can be identified by facility classification numbers shown in an equipment occupancy rate allocation table T33 in FIG. 15, which will be described later.

[0155] The factory shown in Fig. 14 has been assigned the facility classification number "ARE001." In addition to air conditioning equipment 72 and lighting equipment 73, three pieces of manufacturing equipment (MNF0001 to MNF0003) are installed in the factory. Electric power distributed from the power company's power grid is distributed to the air conditioning equipment 72 and lighting equipment 73 via power meter 71. Furthermore, the power distributed from the power company's power grid may be distributed to the three pieces of manufacturing equipment, or power generated in-house by the factory may be distributed.

[0156] In the facility shown in Fig. 14, the power consumption of manufacturing equipment is not included in the area "ARE001." For this reason, the power consumption of manufacturing equipment is also not included in the area where manufacturing equipment is installed that has its equipment numbers (MNF004, MNF005) linked to the power distribution route number CPT003 in the manufacturing equipment power distribution route connection destination management table T32 in Fig. 15 (described later).

[0157] FIG. 15 shows examples of the configuration of a power supply source management table T31, a manufacturing equipment power distribution path connection destination management table T32, an equipment occupancy rate allocation table T33, and a facility maintenance power consumption record table T34.

[0158] The power supply source management table T31 is a table that manages which power source is used to supply power to each power distribution route by the power distribution equipment 70. The power supply source management table T31 has fields for power distribution route number and connected power source.

[0159] The item "power distribution route number" stores a power distribution route number for identifying a power distribution route connected to the power distribution equipment 70 of the factory power network shown in FIG. The connected power source field stores a number assigned to the power source of the factory power network to identify the connected power source.

[0160] The manufacturing equipment power distribution path connection destination management table T32 is a table that manages, for each piece of manufacturing equipment, to which power distribution path the manufacturing equipment is connected as a connection destination. The manufacturing equipment power distribution path connection destination management table T32 has fields for equipment number and power distribution path number. The equipment number field stores an equipment number for identifying the manufacturing equipment. The power distribution path number field stores a power distribution path number for identifying the power distribution path.

[0161] The equipment occupancy rate allocation table T33 is a table for managing the manufacturing equipment installed in each division of a facility (for example, a factory) and the occupancy rate of the manufacturing equipment. The equipment occupancy rate allocation table T33 has the following fields: facility division number, equipment number, and occupancy rate. The facility classification number field stores the facility classification number used to identify facilities within a factory. One facility classification number is assigned to one wattmeter. The equipment number field stores the equipment number of the manufacturing equipment installed in each facility.

[0162] Note that offices used for product design are also treated as a type of "equipment number." For example, if there is one power distribution system and one office, the office occupancy rate is 100%. If there is one power distribution system and it is divided into multiple offices (e.g., floors), the "occupancy rate" is defined based on the area of ​​the entire office and the area of ​​each office.

[0163] The occupancy rate field stores the area occupied by the manufacturing equipment installed in the facility relative to the area of ​​the facility identified by the facility classification number as an occupancy rate. The area occupied within the facility is linked to each piece of manufacturing equipment, and the occupancy rate is defined for that manufacturing equipment. Shared spaces such as corridors, entrances, and jig and tool storage areas where no manufacturing equipment is installed are apportioned according to the occupancy rate of the manufacturing equipment area. For this reason, shared spaces are not managed in a separate table.

[0164] As shown in Figure 14, for example, in an area with facility classification number "ARE001," equipment with equipment numbers MNF0001 to MNF0003 is installed. The occupancy rate represents the area occupied by manufacturing equipment in the area "ARE001" that receives power from the same power distribution system within the factory. Therefore, when multiple pieces of manufacturing equipment are installed in an area identified by a certain facility classification number, the total occupancy rate in that area is 100%.

[0165] The facility maintenance power consumption record table T34 is a table for managing the actual consumption of facility maintenance power for maintaining a facility. The facility maintenance power consumption record table T34 has fields for facility category number, start time, end time, and power usage. The facility category number field stores the facility category number. The start time field stores the time when facility maintenance power usage began. The end time field stores the time when facility maintenance power use ended. The power usage field stores the power used from the facility maintenance power use start time to the facility maintenance power use end time.

[0166] <Example of calculating greenhouse gas emissions for each step in the manufacturing process> Greenhouse gas emissions can also be calculated for each process that is further subdivided from the manufacturing process. Here, a method for calculating CFP from greenhouse gas emissions for each subdivided process will be described with reference to Figures 16 and 17.

[0167] Fig. 16 is a diagram showing an example of the process from the arrival of parts to the shipment of products. Here, we will explain the method of apportioning the power consumption of building lighting, air conditioning, etc. in each process from the arrival of parts to the shipment based on the work time (ST) of each product and the number of units produced, divided into the following patterns A and B.

[0168] (Pattern A) Pattern A is an example of calculating power consumption when three robots use electricity to manufacture products in a manufacturing process, as shown in Figure 5 above. The total power consumption of robots 1 to 3 arranged in the manufacturing process is 100 + 200 + 300 = 600 kWh. The total power consumption of the factory in which robots 1 to 3 are installed is 900 kWh. Therefore, the power consumption for the entire manufacturing process is calculated to be 600 + 900 = 1500 kWh, and this power consumption is apportioned according to the product model, working time (ST), and floor area ratio.

[0169] (Pattern B) Pattern B is an example of calculating the power used from when parts arrive at the factory until the product is shipped. Of the subdivided processes shown in Figure 16, the circled processes consume power. When parts arrive at the factory, forklifts or other vehicles are used to move the parts to their designated locations, consuming power. No power is used for the parts' acceptance inspection, storage, or transport to the assembly equipment. The robot shown in Figure 5 is installed in a different manufacturing facility as the assembly equipment, and performs assembly work, consuming power. Products manufactured by assembling parts undergo functional testing and aging (continuous operation testing), which consumes power. Functional testing is performed to confirm that the product operates according to specifications. Aging is performed by continuously operating the product under stress in order to guarantee quality over its lifespan, eliminating initial defects in the product.

[0170] Note that no electricity is used for the visual inspection and packing of the products, which are carried out after the functional inspection and aging. When the packed products are removed, electricity is used to transport the products to the storage location using a forklift or other device. No electricity is used for storing the products or for inspection before shipping. In addition, trucks are used to ship the products, but shipping is not subject to the allocation of power consumption.

[0171] For this reason, the CFP calculation unit 42 calculates the energy consumption for each product, apportioned by the work time required for each process and the number of products produced, using the electricity consumed in the processes of receiving parts at the manufacturing facility, assembling products using the parts, inspecting the products, and transporting the products as energy.The CFP calculation unit 42 then calculates the CFP of the product by multiplying the energy consumption by a coefficient specific to the energy source.

[0172] For example, the CFP calculation unit 42 calculates the power consumption generated in the process from the arrival of parts to the shipment of products in the same manner as the factory allocation method, and adds it to the CFP for each factory. Furthermore, if the energy sources generated in the process from arrival to shipment include a mixture of gasoline for transportation vehicles and gas for heating, the CFP calculation unit 42 calculates it from the allocation values ​​for each process from arrival to shipment and the emission source information. The power used in each process, from the arrival of parts to the delivery of parts to each production line, functional testing, and product delivery, is also treated as a subject of CFP management. Therefore, the power consumption of each process, the working hours for each product model, and the number of units produced are linked and managed in the same way as the performance table T1 shown in FIG. 5.

[0173] The CFP calculation unit 42 allocates greenhouse gas emissions not only for one product but for each lot. The reason for this is that even if the number of starts for each lot is constant, the number of products that can be shipped varies for each lot due to defective products in the production process. Also, because the energy consumed by air conditioning varies with the season, it is necessary to take into account the fluctuations in air conditioning energy consumption depending on the production period. When the CFP calculation unit 42 allocates greenhouse gas emissions for each lot, it ultimately apportions the energy consumption for each product.

[0174] Furthermore, there are power sources other than wind power and solar power (for example, thermal power plants) whose greenhouse gas emissions cannot be considered zero. An ammeter is placed between the secondary battery and a device that consumes power, such as manufacturing equipment, facility lighting, and air conditioning, and the secondary battery, and the information acquisition unit 41 obtains the current value measured by the ammeter. It should be noted that not all of the power charged in the secondary battery can be discharged, and energy loss occurs. Therefore, the CFP calculation unit 42 adds the power usage assumed to be the power discharged from the secondary battery by the device that receives power from the secondary battery, taking into account the energy loss of the secondary battery, and allocates this as the amount of emissions per product.

[0175] 17 is a diagram showing an example of the configuration of a CFP calculation table T41 used for CFP calculation. The CFP calculation table T41 manages the operation time (ST) and the number of units of each model name, including processes that use electricity other than the processing process (arrival, function inspection, and carry-out) in addition to the performance table T1 shown in FIG.

[0176] The CFP calculation table T41 has the following items: Arrival, Robots 1-3, Functionality Inspection, Delivery, and Area. The Arrival item stores the number of products that have arrived at the factory and been delivered, and the work time (ST) required for delivery. The information stored in the Robots 1-3 items is the same as that in the performance table T1 shown in FIG. 5.

[0177] The functional inspection item stores the number of products that passed the functional inspection and the work time (ST) required for the functional inspection. Generally, the number of good products is less than the number of products produced. The "Exit" field stores the number of products shipped from the factory and the work time (ST) required for the shipment. Generally, the number of shipped products is less than the number of good products. This is because more products than the ordered number are manufactured in anticipation of the production of defective products. The information stored in the "Area" field is the same as that in the performance table T1 shown in Figure 5.

[0178] The design and manufacturing CFP calculation unit 4 according to the embodiment described above automatically acquires energy source information for the manufacturing process, factory, and office, and calculates the CFP for each product by apportioning it using the number of products produced, the work time (ST), and the floor area ratio. In this calculation, the CFP calculation unit 42 can calculate the CFP for each design process and manufacturing process.

[0179] When calculating the CFP for the design process, the CFP calculation unit 42 allocates the office power consumption proportionally based on the occupied floor space of each product's designer and the design period, and multiplies the result by the energy source coefficient. When calculating the CFP for the manufacturing process, the CFP calculation unit 42 adds up the sum of the CFPs obtained by allocating the power consumption of each manufacturing device on the production line proportionally based on the product's work time (ST) and the number of units produced, and multiplying the sum by the energy source coefficient, and the sum of the CFPs obtained by allocating the factory power consumption proportionally based on the floor space occupied by each product, and multiplying the sum by the energy source coefficient. The CFP calculation unit 42 then adds up the CFP for the manufacturing process and the CFP for the manufacturing process to calculate the CFP for each product in the company.

[0180] In the past, companies assumed that they would need to comply with the future obligation to disclose and report CFP for each product (model name), but each company was unable to standardize the method for visualizing that CFP. However, by using the CFP calculation unit 42 according to this embodiment, each company can easily and automatically calculate the CFP for each product.

[0181] The CFP calculated by the CFP calculation unit 42 is sent to the overall CFP calculation unit 32 of the information provision unit 3 shown in Fig. 1, and then visualized in a CFP report created by the CFP report creation unit 33. By using the CFP calculation unit 42 in this way, the CFP of each product can be measured directly, automatically, and accurately on a monthly basis, and the CFP of each product can also be visualized.

[0182] Furthermore, by visualizing the CFP for each product, it becomes possible to take measures to reduce greenhouse gas emissions in the next period. It also makes it possible to continuously improve measures to reduce greenhouse gas emissions, resulting in competitive carbon-free products. If Japanese companies can increase their competitiveness, it will lead to the strengthening of the nation's resilience, which will have the effect of contributing to the improvement of global warming on a global scale.

[0183] Furthermore, by using the CFP calculation unit 42, it becomes possible to reduce greenhouse gas emissions not only in the company that designs and manufactures the product, but also in the partner companies that are part of the supply chain of this company.

[0184] 1 can allocate greenhouse gas emissions for each product or each lot as an optional function of a manufacturing execution system (MES). Therefore, the design and manufacturing CFP calculation unit 4 can be a system that aggregates and links greenhouse gas emissions like a BOM (Bill of Materials) when assembling parts and semi-finished products that a company has purchased from other companies into a product.

[0185] In the above-described embodiment, the CFP was calculated for the design and manufacturing of a tangible product. However, the CFP may also be calculated for the design and manufacturing of an intangible software program product. Furthermore, services provided to customers through the operation of a server and a software program may also be considered as products. Primarily, the power consumption of the designer's office, the cloud server, and the on-premise server are taken into consideration.

[0186] The CFP calculation system 10 according to the embodiment described above targets the energy consumed in the design and manufacturing processes of a product during its life cycle. However, product reuse may also be included in the life cycle and CFP may be calculated. The following two types of product reuse are assumed: (1) After a product has been shipped and its life cycle is completed, it is collected as waste. The collected waste product is reused in part or in whole. (2) Reusing products that fail pre-shipment testing or intermediate testing. For example, castings that fail testing are melted down and reused as materials to be used again in the manufacture of new products.

[0187] The present invention is not limited to the above-described embodiment, and it goes without saying that various other applications and modifications are possible without departing from the gist of the present invention as set forth in the claims. For example, the above-described embodiment has described the system configuration in detail and specifically to clearly explain the present invention, and is not necessarily limited to a system including all of the described configurations. Furthermore, it is also possible to add, delete, or replace part of the configuration of this embodiment with other configurations. In addition, the control lines and information lines shown are those that are considered necessary for the explanation, and do not necessarily show all the control lines and information lines in the product. In reality, it can be assumed that almost all components are interconnected. [Explanation of symbols]

[0188] 1...Management system, 2...Common platform, 3...Information provision unit, 4...Design and manufacturing CFP calculation unit, 10...CFP calculation system, 41...Information acquisition unit, 42...CFP calculation unit, 43...Output unit, T1...Performance table, T2...Allocation table, T3...Emission source information table

Claims

1. an information acquisition unit that acquires the amount of energy consumed in a design process and a manufacturing process of a product during its life cycle, and information on the energy source of the energy; a CFP calculation unit that calculates the energy consumption for each product based on the energy source information and energy consumption of the energy consumed in a design facility where design work is performed in the design process and the energy consumed in a manufacturing facility where the product is manufactured in the manufacturing process, and multiplies the total energy consumption for each product by a coefficient specific to the energy source to calculate the CFP of the product for each predetermined unit; an output unit that outputs CFP information of the product based on the energy source information; CFP calculation system.

2. The CFP calculation unit tally up the total energy for each energy source and for each applicable period, and calculates the CFP of the product by multiplying the total energy consumed in the applicable period by the coefficient applied to the applicable period. The CFP calculation system according to claim 1 .

3. The CFP calculation unit calculates the energy consumption for each product by adding a value obtained by dividing the amount of energy consumed at the design facility by the ratio of floor area occupied by the designer of the product at the design facility and the design period for each product, and a value obtained by dividing the amount of energy consumed at the manufacturing facility by the number of units of the product manufactured by manufacturing equipment, the working time required for the manufacturing, and the ratio of floor area occupied by the manufacturing equipment at the manufacturing facility. The CFP calculation system according to claim 1 .

4. The CFP calculation unit acquires a ratio for each of the products between a direct emission source that directly emits greenhouse gases by directly consuming the energy and an indirect emission source that indirectly emits the greenhouse gases by consuming the energy purchased from an energy supply company, and calculates the energy consumption for each of the products for each of the design process and the manufacturing process based on the ratio. The CFP calculation system according to claim 3 .

5. The CFP calculation unit calculates the energy consumption amount by defining electricity consumed in the design process as the energy and defining at least one of electricity and gas consumed in the manufacturing process as the energy. The CFP calculation system according to claim 4 .

6. The CFP calculation unit refers to a worker number management table that manages the number of workers available to work on the design of the product for each design facility and a worker number management table that manages the number of workers engaged in design for each product, and allocates the energy consumption of the design facility by a value obtained by dividing the number of workers by the number of workers. The CFP calculation system according to claim 5 .

7. The CFP calculation unit refers to an attendance registration table that manages the number of design man-hours performed by the designers who design the products for each product, and a work location management table that manages the work locations of the designers, and allocates the energy consumption of the design facility by a value obtained by dividing the number of design man-hours for each product by all the number of design man-hours. The CFP calculation system according to claim 5 .

8. The CFP calculation unit calculates the energy consumption for each of the manufacturing processes, which is calculated by dividing the energy consumption by the work time required for each process and the number of manufactured products, by the electricity consumed in the processes of receiving parts at the manufacturing facility, assembling the product using the parts, inspecting the product, and carrying out the product, among the manufacturing processes. The CFP calculation system according to claim 6 .

9. acquiring information on the amount of energy consumed in the design process and manufacturing process of the product during its life cycle, and on the energy source of the energy; a step of calculating the energy consumption for each product based on the energy source information and energy consumption of the energy consumed in the design facility where design work is performed in the design process and the energy consumed in the manufacturing facility where the product is manufactured in the manufacturing process, and multiplying the sum of the energy consumption for each product by a coefficient specific to the energy source to calculate the CFP of the product for each predetermined unit; and outputting CFP information of the product based on the energy source information. CFP calculation method.

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