CFP calculation system and CFP calculation method

Abstract

This CFP calculation system comprises: an information acquisition unit; a CFP calculation unit that calculates an energy consumption amount for each product on the basis of energy consumed in a design facility in which design work is performed in a design process as well as each of energy source information and an energy consumption amount for energy consumed in a manufacturing facility in which products are manufactured in a manufacturing process, and calculates CFP of the products 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 that outputs information pertaining to the CFP of the products on the basis of the energy source information.

Description

CFP calculation system and CFP calculation method

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

[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 that "the information processing system creates and stores usage history information for the type of electricity actually used in machine tools, conveyance machines, transport vehicles, etc. in each process from production to recycling in a manufacturing process of a product or part (including a manufacturing process using recycled parts) that can selectively use multiple types of electricity using different power generation methods, and calculates the amount of CO2 emitted directly or indirectly in the manufacture of each product or part based on the stored usage history information." ２ Furthermore, if the type of electricity can be selected for each sub-process included in the manufacturing process, the information processing system creates and stores usage history information indicating which type of electricity was selected and used for each sub-process and in what time period, and calculates the CO2 emissions for the entire process, the manufacturing process, or each sub-process based on this usage history information. ２It states that "emissions will be calculated."

[0006] Patent No. 7203063

[0007] In the production of industrial products, in addition to the production equipment, energy is also consumed for maintaining 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 process and manufacturing process.

[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.

[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 and manufacturing processes. Problems, configurations, and effects other than those described above will become clear from the description of the following embodiments.

[0012] 1 is a diagram showing an example of the overall configuration of a CFP calculation system according to one embodiment of the present invention. 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. FIG. 3 is a block diagram showing an example of the hardware configuration of a computer according to one embodiment of the present invention. FIG. 4 is a flowchart showing an example of a method for calculating product CFP according to one embodiment of the present invention. FIG. 5 is a diagram showing an example of the configuration of a performance table according to one embodiment of the present invention. FIG. 6 is a diagram showing an overview of a function for calculating CFP according to one embodiment of the present invention. FIG. 7 is a diagram showing examples of the configuration of an order table, an order detail table, and a production table according to one embodiment of the present invention. FIG. 8 is a diagram showing examples of the configuration of a power management table, a process management table, and a performance management table according to one embodiment of the present invention. FIG. 9 is a layout diagram of an office according to one embodiment of the present invention. FIG. 10 is a diagram showing examples of the configuration of a facility employee management table and a product design employee management table according to one embodiment of the present invention. FIG. 11 is a diagram showing examples of the configuration of an attendance registration table, a job number definition table, and a work location management table according to one embodiment of the present invention. FIG. 12 is a diagram showing an example of attendance management registration according to one embodiment of the present invention. FIG. 13 is a power distribution route diagram showing an example of a power grid within a factory according to one embodiment of the present invention. FIG. 14 is a diagram showing an example of facilities within a factory where manufacturing equipment according to one embodiment of the present invention is installed. FIG. 15 is a diagram showing examples of the configuration of a power supply source management table, a manufacturing equipment power distribution route connection destination management table, an equipment occupancy rate allocation table, and a facility maintenance power consumption performance table according to one embodiment of the present invention. It is a diagram showing an example of a process from the arrival of parts to the shipment of products according to an embodiment of the present invention.It is a diagram showing an example of a CFP calculation table used for CFP calculation according to an embodiment of the present 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] 1 is a diagram showing an example of the overall configuration of a CFP calculation system 10 according to one 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] The management system 1 is a system used mainly by suppliers that provide companies with product parts, raw materials, etc. Suppliers manage parts, raw materials, etc. through a common platform 2. The common platform 2 has a portal site, authentication function, ID management function, hub function, etc., and manages access by each supplier. The common platform 2 also manages information on raw materials, parts, etc. registered by suppliers. The common platform 2 is used by a company (supplier) that is different from the company that uses the information provider 3 and 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 "procurement CFP." The procurement CFP represents emissions in the entire supply chain excluding companies using the CFP calculation system 10 according to this embodiment. The entire supply chain includes not only procurement, design, and manufacturing shown in FIG. 1 but also delivery, sales, etc. In other words, the procurement CFP covers upstream processes in the supply chain (manufacturing of raw materials, commuting of employees of other companies, transportation and delivery 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 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, which will be 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 a "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 direct and indirect greenhouse gas emissions. Therefore, a design and manufacturing CFP calculation unit 4 is provided that can calculate the amount of greenhouse gas emissions emitted in the design and manufacturing processes and calculate the CFP for each product.

[0022] Here, we will explain the general configuration of the design and manufacturing CFP calculation unit 4. 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 CFP in 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 the CFP of the design process for each product (model name) can be calculated.

[0024] The design and manufacturing CFP calculation unit 4 calculates the CFP for each process by considering fuel combustion in factories, power 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 in 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 varies depending on the product model. The required floor area also varies 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 by combining the CFP of the robots and the CFP prorated 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 based on the product's working 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 allocates the power consumption of the factory based on the floor area occupied by each product, and calculates the sum of the CFPs obtained by multiplying the power consumption of the factory by the coefficient of the energy source. Then, the design and manufacturing CFP calculation unit 4 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 for each product in the company. After calculating the CFP for 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 description, products are identified by their model names.

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

[0029] 2 is a block diagram showing an example of the internal configuration of the design and manufacturing CFP calculation unit 4. 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 sources. For example, the information acquisition unit 41 acquires information on the energy sources, such as electricity and gas, used by an office used in the design process and a 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 by the design and manufacturing CFP calculation unit 4, and is, for example, the tables shown in FIGS. 5, 6, 7, 8, 10, 11, 15, and 17.

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

[0034] The CFP calculation unit 42 also 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 predetermined unit. The CFP calculation unit 42 also acquires necessary information from table Tx. The CFP calculation unit 42 determines the CFP for the manufacturing process as the sum of the CFPs 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 Hardware Configuration of Computer> Next, a description will be given of the hardware configuration of computer 50 constituting each device of design and manufacturing CFP calculation unit 4. Fig. 3 is a block diagram showing an example of the hardware configuration of computer 50. Computer 50 is an example of hardware used as a computer that can operate as design and manufacturing CFP calculation unit 4 according to this embodiment. In design and manufacturing CFP calculation unit 4 according to this embodiment, each functional block shown in Fig. 2 is configured by computer 50 executing a program, and these functional blocks work together to realize a method for calculating product CFP shown in Fig. 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, the nonvolatile storage 57 also stores programs for operating the computer 50.

[0042] The nonvolatile storage 57 stores programs, data, and the like required for the operation of the CPU 51. In other words, 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 network interface card (NIC) 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 local area network (LAN) connected to a terminal of the NIC, a dedicated line, or the like. 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] 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 calculates the sum of the energy consumption amounts for each product, and multiplies the sum by a coefficient specific to the energy source to calculate the CFP of the product for each predetermined 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. The 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, work time (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, power consumption and information related to 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 directly acquire power consumption information from manufacturing devices and equipment.

[0050] In addition, 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 production volume. The floor area represents the area used to manufacture each product. The work time (ST) represents the time required to perform work on each product. The production volume 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 process. 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 Figure 5, a specific example of the process by 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 description, 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 areas of the factory and office. The power consumption of robot 1 is 100 kWh, the power consumption of robot 2 is 200 kWh, and the power consumption of robot 3 is 300 kWh. The power consumption of the factory is 900 kWh, and the power consumption of the office is 1000 kWh.

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

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

[0055] 2 calculates the power consumption of a product with model name A using the following formula (1): Power consumption of model name A = Power consumption of robots (FA equipment) + Power consumption in factory + Power consumption in office = (Power used by robot 1 with a power consumption of 100 kWh to manufacture one product of model name A) + (Power used by robot 2 with a power consumption of 200 kWh to manufacture one product of model name A) + (Total power consumption for lighting, air conditioning, etc. in the area used to manufacture model name A) + (Total power consumption for lighting, air conditioning, etc. in the office used to design model name A) ... (1)

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

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

[0058] Furthermore, the CFP calculation unit 42 calculates the CFP for the model name A using the following formula (2): CFP calculated for the production of a product with one model name = {(the apportioned values ​​of the power consumption of the manufacturing devices used in the production of the product and the sum thereof) + (the apportioned values ​​of the power consumption of lighting, air conditioning, etc. in the factory) + (the apportioned value of the power consumption in the office)} × 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). Regarding the apportioned value of the office power consumption in formula (2), if cloud application software, databases, etc. 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 gas emissions in the manufacture of a product with one model name is 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 of Model A = Power consumption of Model A x Coefficient (for example, the CO2 figure for fiscal year 2022 announced by XXX Power Co., Ltd.) ２ Emission factor) ... (3)

[0062] By substituting specific numerical values ​​into formula (3), the CFP calculation unit 42 calculates the CFP of model A as follows: CFP of model A = 0.021 kWh × 0.376 kg - CO ２ / kwh =0.008kg-CO ２

[0063] Here, the CFP calculated when multiple energy sources are used will be described in more detail with reference to the formulas shown in Fig. 6. 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 multiple energy sources.

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

[0065] Direct emissions are, for example, greenhouse gas emissions caused by burning gas. Direct emissions are high in the process of burning gas to melt metal materials in factories and pour them into molds. Indirect emissions are, for example, greenhouse gas emissions caused by consuming electricity purchased from an electric power company. In the process of polishing products removed from molds, 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 FIG.

[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. 6. The 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 as the product model name. The allocation ratio (gas) field stores the gas allocation ratio (for model name A, allocation ratio X) as the allocation ratio of energy consumed by the product. The allocation ratio (electricity) field 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 for number (1) and electricity for number (2). For number (n), although not shown, for example, hydrogen obtained from fossil energy is stored as the emission source. The emission source unit field stores either α, which indicates direct emission, or β, which indicates indirect emission.

[0070] The CFP calculation unit 42 refers to the allocation table T2 and acquires 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 acquired ratio.

[0071] Furthermore, the CFP calculation unit 42 collects measured values ​​of power consumption in each process from the design process and the 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 of the type name A = (direct emissions in the assembly process) + (indirect emissions in the design process and assembly process) = emission source (gas) unit × allocation ratio (gas) + emission source (electricity) unit × allocation ratio (electricity) = α × X + β × L (4)

[0073] Similarly, the CFP calculation unit 42 calculates the CFP of type name B using the following formula (5): CFP of type name B = (direct emissions in the assembly process) + (indirect emissions in the design process and assembly process) = emission source (gas) unit × allocation ratio (gas) + emission source (electricity) unit × allocation ratio (electricity) = α × Y + β × M (5) In this way, the CFP calculation unit 42 can calculate the product CFP for each type 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 product type A when multiple energy sources are used (also abbreviated as "CFP of product 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 equation (6) are as follows: "Σ" appearing in each of the following terms means that the calculation is performed 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)} Term 1 includes both in-house power generation and purchased electricity. The amount of electricity consumed by the manufacturing equipment is calculated by calculating Term 1. Note that even if the electricity is purchased from the same power company, if the emission coefficient changes between months, it is calculated separately.

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

[0079] Third term = Σ {Power consumption of office power system (n) × Emission coefficient (n) of power system (n) × Apportioned value of model name A} The third term is used to calculate the power 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 the maintenance of the factory. In the third term, the power consumption is calculated by apportioning it to the production portion of model name A out of the total production of products.

[0080] Term 4 = CFP for cloud service used during production × apportioned value related to model name A Term 4 is used when a cloud service is used for product production. Possible cloud services include, for example, SaaS (Software as a Service), PaaS (Platform as a Service), and IaaS (Infrastructure as a Service). Term 4 calculates the CFP for the production period of model name A, apportioning it based on a ratio related to model name A. For the CFP 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 to produce model A × emission coefficient of thermal energy source (j)} Term 5 is used in calculations that assume, for example, that the casting process of an engine block is carried out using combustible gas. This calculation makes it possible to calculate CFP based not only on electricity but also on greenhouse gases emitted by burning combustible gas.

[0082] Term 6 = Σ {Thermal energy source (j) used in factory air conditioning, etc. × Emission coefficient of thermal energy source (j) × Apportioned value of model name A involving thermal energy source (j)} Term 6 is used to calculate model name A when thermal energy obtained from fuel is used for air conditioning within a factory. Term 6 makes it possible to calculate CFP, for example, including cases where 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 x Emission coefficient (i) of energy source (j) x Apportioned value of model name A} Term 7 is used to calculate the portion of 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 factory maintenance. Term 7 calculates the CFP associated with the consumption of thermal energy apportioned by the production portion of model name 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 Fig. 7 and Fig. 8. Fig. 7 is a diagram showing examples of the configurations of the order table T11, the order detail 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. The order details table T12 has fields for 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 order quantity for the ordered product model name. The product model name field stores the ordered product model name. The serial number field stores the serial number for the product model name. As indicated by the arrow in the figure, the serial number in the order details table T12 is identified using the order detail number in the order table T11 as a key.

[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 overall 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 Good Products" field stores the actual number of good products for a product identified by the product model name. The input quantity and the actual number of good products are set to the same value, but there are cases where the actual number of good products is lower. The value stored in the "Actual Number of Good Products" field is the same as the value stored in the "Production Quantity" field for Model Name A in the performance table T1 in FIG. 5.

[0090] The CFP value / unit quantity actual item registers the CFP actual for each manufacturing process, the proportionally-divided CFP actual value attributable to air conditioning, lighting, etc. based on the area ratio of each manufacturing process device in the factory, and the total CFP actual for the design process. This CFP actual value 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 CFP of the product by tallying the total energy for each energy source and for each applicable period, and 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 power used, which is the energy consumed by each manufacturing device, will be described with reference to FIG.

[0092] 8 shows examples of the configuration of the power supply 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 process and the manufacturing process. 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 start date of application, and the end date of application.

[0093] The power supply control number field stores a power supply control number that can be used to 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. The emission factor for private power generation (solar power) is 0.

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

[0095] Here, the procedure for calculating 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 FIG. 7 ) for each power source. Next, the CFP calculation unit 42 calculates CFP by referencing the emission coefficient for each applicable period for each power source. The calculated CFP value is registered in the CFP value / unit quantity actual result field in the production table T13 in FIG. 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 process control number field stores the process control number used to manage which manufacturing equipment is installed in which area the product is to be processed.

[0098] The equipment number field stores an equipment number for identifying a manufacturing device used in a process managed by a process number and a process control number. The work procedure or recipe number field stores an work procedure or recipe number, which is a control number that indicates the processing recipe of the 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 control number. In FIG. 8, the status of all process control numbers is "completed."

[0101] The item "Number of Works Started" stores the number of works started, which indicates when production of the product has started. The item "Number of Works Completed" stores the number of works completed, which indicates when production of the product has been completed. In Figure 8, the number of works started and the number of works completed 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 serial number (MP100001) shown in the performance management table T16, for example, manufacturing is performed using a manufacturing device with equipment number (MNF0001) linked to process control number (PR0001). When the work instructed by work instruction number (WK0000001) is completed, manufacturing is performed using a manufacturing device with equipment number (MNF0002). Therefore, the manufacturing device with equipment number (MNF0001) is used in the manufacturing process of 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 product type A is used in a process identified by the process management numbers (PR0001, PR0002). The amount of power used at this time 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 product type 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 of CFP for 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 calculation method of 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.

[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. Design period CFP per product = (CFP dependent on the designer + CFP due to the design environment + CFP due to prototyping) ÷ specified number ... (7)

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

[0108] Furthermore, the CFP by design environment in formula (7) is calculated for 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] The design environment (B) uses design resources from an on-premise environment. In this case, the CFP calculation unit 42 refers to the equipment occupancy rate allocation table T33 in FIG. 15 (described later) to extract the power consumption for the design period for the "equipment number" of the server being used, and calculates the CFP based on this power consumption. Note that the CFP can also be calculated by allocating it to other products being 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 non-defective products recorded in the production table T13 of Fig. 7 by the CFP value / unit quantity actual. The CFP value / unit quantity actual is calculated by the CFP calculation unit 42 acquiring the manufacturing process (managed by process control number) that is started when manufacturing a specific product (e.g., model name A) based on the process control table T15 of Fig. 8. Thereafter, the CFP value / unit quantity actual is calculated by aggregating the serial number of the target product and the amount of power used in all processes in the result control table T16 of Fig. 8.

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

[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 a facility worker number management table T21 and a product design employee number management table T22 shown in Fig. 10. An example of an office for calculating 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 designer-dependent CFP calculation method (A).

[0113] Figure 9 is a layout diagram of an office. The office is assigned the facility division number "ARE010." The floor area of ​​the office is divided into sections A to C to identify the locations of designers (referred to here as employees). Sections A and B are provided with desks and chairs that can accommodate up to four employees. Section C is provided 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] 10 shows an example of the structure of the facility worker number management table T21 and the product design worker number management table T22. The facility worker number 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 number of workers. The facility worker number management table T21 has the following fields: facility classification number, number of workers, application start date, and application end date.

[0115] The facility classification number field stores the facility classification number. The number of employees field stores the number of employees working in offices classified by the facility classification number. The application start field stores the application start date of the designer-dependent CFP calculation. The application end field 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 workforce management table T22 is a table that manages the number of employees engaged in design for each product, i.e., for each product model name, as the number of design workers. The product design workforce management table T22 apportions the power consumption for each product model name, application start date, application end date, and facility classification number by dividing the number of design workers 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 workforce management table T22. The product design workforce management table T22 has a field for number of workers.

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

[0119] The product design employee number management table T22 indicates that the design of product model name 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 apportions the energy consumption of the design facility by dividing the number of workers. For example, the CFP calculation unit 42 apportions the power consumption for each facility, i.e., for each facility classification number, by dividing the number of design workers by the number of workers, thereby correctly calculating the power used by employees engaged in design during design. The process of apportioning the power consumption for each facility classification number by dividing the number of design workers by the number of workers is calculated for each application period (from the start of application to the end of application) of the product design worker 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 for each employee. The attendance registration table T23 has the following fields: employee ID, work date, arrival at work, departure from work, direct: work number, direct: man-hours, indirect work, and indirect: man-hours. Here, "direct work" refers to product development work. "Indirect work" refers to work done by the accounting or human resources department that supports the product development department, or work not directly related to the product, such as work done by product development department personnel in meetings or training sessions.

[0123] The employee ID field stores an employee ID for identifying an employee. The work day field stores the work day on which the employee worked. The clock-in field stores the time when the employee clocked in. The clock-out field stores the time when the employee clocked out.

[0124] The Direct: Task Number field stores the task number that identifies which product the employee developed. The Direct: Man-hours field stores the man-hours of the product development (direct work) performed by the employee, specified in the Direct: Task Number field. The Indirect Work field stores task numbers that identify work classifications such as training and meetings that are not related to product development. The Indirect: Man-hours field stores the indirect work man-hours performed by the employee for the work classification specified in the Indirect Work field.

[0125] The attendance registration table T23 allows the number of employees working on each applicable period to be determined based on the task number associated with the product design. The designer-dependent CFP calculation method (B) eliminates the need for the product design employee headcount management table T22 in Figure 10.

[0126] The power consumption for a facility classification number is calculated monthly, but because design work is typically carried out across multiple locations, the facility classification in which employees are located each day during the target period is checked. When calculating the emissions, emissions are calculated based on the man-hours for each facility classification. Furthermore, in the CFP for the design process, only the man-hours for work that contribute to product development are calculated. Therefore, the CFP calculation unit 42 can calculate the monthly power consumption for a facility classification number (e.g., ARE010) by apportioning the "target work man-hours" by "total worker man-hours." In this formula, "workers" refers to employees who directly performed the work. Total worker man-hours refers to the total man-hours for work performed by employees in the target facility classification. Target work man-hours refers to the daily man-hours for each work number. Because power companies' emission coefficients are typically updated only monthly, power consumption is calculated monthly.

[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 for managing 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 type, and update date. The employee ID field stores the employee ID. The facility type field stores the facility type number. The update date field stores the date on which the work location management table T25 was updated.

[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 man-hours of work performed by workers. The man-hours are the total of the direct 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 man-hours of work 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 the specific product using the following formula (8): Energy consumption at the design facility of the specific product = Σ (energy consumption at the design facility where the designer of the specific product was located) × (total design man-hours for the specific product) ÷ (total work man-hours for all workers in the facility where the designer of the 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. It is also possible for employees to 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] FIG. 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. Starting from the top of FIG. 12, attendance records for each power management period are registered for employees 01, 02, and 03. A power management period is defined as a period, such as a day, during which the power source used by employees designing products is managed. Here, the power management period is defined in the order of power management period (n-2), power management period (n-1), and power management period (n). For example, if electricity is purchased from a power company and the emission coefficient changes monthly, 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] This attendance management registration example makes it possible to clarify the total power used by employees working on work related to model name A during a power management period for each facility category where the 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). This employee also 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 clarified 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 by facility classification number ARE010, and the employee identified as employee 03 performed design work in the office identified by facility classification 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 man-hours for model name A per month 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 consumption 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, calculations can be performed by tallying up by employee ("employee ID") However, if one employee designs at multiple locations, the man-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 A in April 2023 will be explained with a specific example. In this example, the work number for model A in April is PWK00001 and the facility classification (workplace classification) 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) Processing for Obtaining Work Numbers for Model Name A The CFP calculation unit 42 obtains PWK00001 and PWK0002 as work numbers related to the design work for model name A from the work number definition table T24 shown in FIG.

[0140] Processing Procedure (2) Identifying the Facility Classification Number for which Emissions are 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) Processing to Obtain Total 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 category (ARE010) obtained in Processing Procedure (2) during the target period as the total worker man-hours. This processing obtains, for example, the total work man-hours (unit: hours) used in the facility category (ARE010) in April.

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

[0143] Processing Procedure (5) Processing for Obtaining Emission Coefficients In this processing, 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 of 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 of 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 = (power consumption in April for facility classification (ARE010)) × emission coefficient for April × (number of man-hours for target work / total number of man-hours for workers) ... (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] <Method of Calculating CFP in Manufacturing Process> Next, a method of 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 the 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] Furthermore, 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 supply management table T14 of FIG. 9. The power distribution equipment 70 includes a transformer (not shown) and distributes power to each device in the factory. For example, a power distribution route is connected to the power distribution equipment 70, and power is distributed through this power distribution route. CPT001 to CPTXXX attached to the power distribution route represent the power distribution route number managed in the power supply source management table T31 of FIG. 15 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 used for air conditioning and the like 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] Furthermore, since it is possible to measure the power consumption of each manufacturing device individually, no power meter 71 is connected to the other paths of the power distribution path CPTXXX. The device numbers for identifying the manufacturing devices are managed in a manufacturing device power distribution path connection destination management table T32 in FIG. 15, which will be described later.

[0153] Although not shown, power distribution routes CPT001 and CPT002 are also connected to a power meter 71, similar to power distribution route CPTXXX, making it possible to measure the power in a certain area and also to measure the power of individual manufacturing equipment.

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

[0155] The factory shown in Fig. 14 is 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 a 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] 14, the power consumption of the manufacturing equipment is not included in the area "ARE001." For this reason, the power consumption of the manufacturing equipment is also not included in the area where the manufacturing equipment is installed, whose equipment numbers (MNF004, MNF005) are linked to the power distribution route number CPT003 and registered 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 path by the power distribution equipment 70. The power supply source management table T31 has fields for power distribution path number and connected power source.

[0159] The field for 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 grid shown in Fig. 13. The field for connected power source stores a number assigned to a power source in the factory power grid for identifying 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 (e.g., a factory) and the occupancy rate of the manufacturing equipment. The equipment occupancy rate allocation table T33 has fields for facility division number, equipment number, and occupancy rate. The facility division number field stores a facility division number for identifying a facility within a factory. One facility division number is assigned to one power meter. The equipment number field stores the equipment number of the manufacturing equipment installed in each facility.

[0162] Note that an office used for product design is 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, equipment with equipment numbers MNF0001 to MNF0003 is installed in an area with facility classification number "ARE001." The occupancy rate represents the area occupied by manufacturing equipment in area "ARE001" that receives power from the same power distribution system within the factory. Therefore, when multiple manufacturing equipment are installed in an area identified by a certain facility classification number, the total occupancy rate for 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 started. The end time field stores the time when facility maintenance power usage ended. The power usage field stores the power usage used from the facility maintenance power usage start time to the facility maintenance power usage end time.

[0166] <Example of calculating greenhouse gas emissions for each subdivided manufacturing process> Greenhouse gas emissions can also be calculated for each subdivided 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] 16 is a diagram showing an example of a 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 working 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 consumption from the time 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, power is consumed when the parts are moved to their designated positions using a forklift or similar device. No power is consumed during the parts' acceptance inspection, storage, or transport to the assembly equipment. As assembly equipment, the robot shown in Figure 5 is installed in a different manufacturing facility and performs assembly work, which consumes 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 ensure quality throughout its lifespan and to eliminate initial product defects.

[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's allocation method, and adds it to the CFP for each factory. Furthermore, if the energy sources generated in the process from the arrival of parts to the shipment include a mixture of gasoline for transportation vehicles and gas for heating, the CFP calculation unit 42 calculates the CFP from the allocation values ​​for each process from the arrival of parts to the 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 the delivery of products, is also treated as a subject for 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 manner 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 (e.g., thermal power plants) whose greenhouse gas emissions cannot be considered zero. In a device that receives power from a secondary battery charged with power supplied from such a power source, an ammeter is placed between the secondary battery and a power-consuming device such as a manufacturing device, facility lighting, or air conditioning device, and the information acquisition unit 41 obtains the current value measured by the ammeter. Note 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 receiving power from the secondary battery, taking into account the energy loss of the secondary battery, and apportions this as the 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 model names, including processes (arrival, function inspection, and carry-out) that use power other than the processing process, in addition to the performance table T1 shown in FIG.

[0176] The CFP calculation table T41 has the following fields: Arrival, Robots 1 to 3, Functionality Inspection, Delivery, and Area. The Arrival field 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 to 3 fields 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 have been determined to be good through functional inspection, and the labor time (ST) required for the functional inspection. Generally, the number of good products is less than the number of products produced. The carry-out item stores the number of products that are carried out from the factory and shipped, and the labor time (ST) required for carrying-out. 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 item 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 CFP for the design process, the CFP calculation unit 42 allocates the office power consumption by the occupied area of ​​each product's designer and the design period, and multiplies the result by the energy source coefficient. When calculating 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 by 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 by the floor area 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 obligation to disclose and report CFP for each product (model name) in the future, 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 by a CFP report created by the CFP report creation unit 33. By using the CFP calculation unit 42 in this way, the CFP for each product can be measured directly, automatically, and accurately on a monthly basis, and the CFP for 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. Furthermore, measures to reduce greenhouse gas emissions can be continuously improved, resulting in competitive carbon-free products. If Japanese companies can increase their competitiveness, it will lead to the strengthening of the nation's strength, and on a global scale, it will have the effect of contributing to the improvement of global warming.

[0183] In addition, by using the CFP calculation unit 42, it becomes possible to reduce greenhouse gas emissions not only at the company that designs and manufactures the product, but also at the partner companies in the company's supply chain.

[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 purchased by a company into a product.

[0185] In the above-described embodiment, the CFP related to the design and manufacturing of a tangible product was calculated, but the CFP related to the design and manufacturing of an intangible software program product may also be calculated. Furthermore, a service provided to a customer by the operation of a server and a software program may also be considered as a product. The power consumption of the designer's office, the cloud server, and the on-premise server are mainly taken into consideration.

[0186] The CFP calculation system 10 according to the embodiment described above focuses on 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 when calculating CFP. The following two types of product reuse are envisioned: (1) When a product's life cycle ends after it is shipped, the product is collected as waste. Reusing part or all of the product collected as waste. (2) Reusing products that have failed testing before or during product shipping. For example, castings that have failed testing are melted down and reused as materials to be used again in the manufacture of products.

[0187] The present invention is not limited to the above-described embodiments, and various other applications and modifications are possible without departing from the spirit of the present invention as defined in the claims. For example, the above-described embodiments provide detailed and specific descriptions of the system configuration in order to clearly explain the present invention, and are not necessarily limited to systems that include all of the described configurations. Furthermore, it is also possible to add, delete, or replace part of the configuration of the present embodiments with other configurations. Furthermore, the control lines and information lines shown are those considered necessary for explanation, and do not necessarily represent all control lines and information lines in the product. In reality, it can be assumed that almost all configurations are interconnected.

[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. A CFP calculation system comprising: an information acquisition unit that acquires the amount of energy consumed in the design process and manufacturing process of the 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 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.

2. The CFP calculation system described in claim 1, wherein the CFP calculation unit tally the total energy for each energy source and for each applicable period, and multiplies the total energy consumed during the applicable period by the coefficient applicable to the applicable period to calculate the CFP of the product.

3. The CFP calculation system of claim 1, wherein the CFP calculation unit calculates the energy consumption for each product by adding together the amount of energy consumed at the design facility, which is apportioned based on the floor area ratio occupied by the product's designer at the design facility and the design period for each product, and the amount of energy consumed at the manufacturing facility, which is apportioned based on the number of units of the product manufactured by the manufacturing equipment, the working time required for the manufacturing, and the floor area ratio occupied by the manufacturing equipment at the manufacturing facility.

4. The CFP calculation system described in claim 3, wherein the CFP calculation unit obtains the ratio for each product between direct emission sources that directly emit greenhouse gases by directly consuming the energy and indirect emission sources that indirectly emit the greenhouse gases by an energy supply company by consuming the energy purchased from the energy supply company, and calculates the energy consumption for each product for each of the design process and the manufacturing process based on the ratio.

5. The CFP calculation system of claim 4, wherein the CFP calculation unit calculates the energy consumption by using electricity consumed in the design process as the energy and at least one of electricity and gas consumed in the manufacturing process as the energy.

6. The CFP calculation system described in claim 5, wherein 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 apportions the energy consumption of the design facility by the value obtained by dividing the number of workers by the number of workers.

7. The CFP calculation system described in claim 5, wherein the CFP calculation unit refers to an attendance registration table that manages the man-hours of design work performed by the designer who designed the product for each product, and a work location management table that manages the designer's work location, and apportions the energy consumption of the design facility by the value obtained by dividing the man-hours of design work for each product by all the man-hours of design work.

8. The CFP calculation system described in claim 6, wherein the CFP calculation unit calculates the energy consumption for each of the manufacturing processes, including the arrival of parts at the manufacturing facility, the assembly of the product using the parts, the inspection of the product, and the removal of the product, as the energy, and calculates the working time required for each process and the energy consumption for each of the products apportioned by the number of products produced.

9. A CFP calculation method comprising the steps of: acquiring the amount of energy consumed in the design process and manufacturing process of the product during its life cycle, and energy source information for the energy; calculating the energy consumption for each product based on the energy source information and energy consumption for 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; multiplying 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 outputting CFP information for the product based on the energy source information.

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