Method and system for regulating and controlling reserve quantity of equipment spare parts
By combining the equipment's own and external factors, predicting the quantity of requisitions and adjusting the reserve strategy, the scientific problem of spare parts inventory management in the existing technology is solved, reasonable spare parts inventory management is achieved, and management costs and waste are reduced.
Patent Information
- Application Number
- CN202411268290.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2024-12-17
AI Technical Summary
The existing equipment spare parts inventory management methods lack scientific restrictions, resulting in a backlog of dull spare parts and excessive scrapping of spare parts, increasing management costs and waste of funds, and failing to effectively consider the spare parts and external factors, resulting in insufficient or excessive reserves. , affect inventory management.
Starting from the self and external factors of spare parts, predict the quantity of goods received during the procurement cycle, and determine the spare parts that must be stored, can be stored and cannot be stored through classified analysis, adjust the reasonable quantity of reserves, and use mathematical algorithms to combine the equipment three factors ( Inventory regulation is carried out for external factors, own factors and external factors).
A reasonable inventory of spare parts is achieved, the generation of dull spare parts and excessive spare parts is reduced, management costs and waste of funds is reduced, and the normal use and smooth production of equipment is ensured.
Smart Images
Figure CN119151437A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of equipment control, and in particular relates to a method and system for controlling the reserve quantity of equipment spare parts. Background Art
[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.
[0003] At present, there is no scientific limit on the number of materials to be drawn in the spare parts inventory management. The materials are drawn based on the experience of the personnel, resulting in a large backlog of stagnant spare parts. On the one hand, it takes up a lot of company costs; on the other hand, it is very easy to draw too much material and cannot be consumed, and the spare parts that exceed the shelf life are scrapped, resulting in a waste of funds. In addition, a large number of spare parts brings management costs and increases the workload of warehouse managers such as inventory counting and maintenance.
[0004] The current means of calculating equipment spare parts safety inventory are limited to the characteristics of spare parts. There is no global classification analysis of the variables affecting spare parts. Only three variables, such as failure probability (failure rate, average consumption, annual consumption rate), procurement cycle, and cost, are considered, and the impact of other variables on spare parts inventory is missing.
[0005] The existing safety stock calculation method does not take into account the external impact of spare parts. There is no classification of what must be reserved or not reserved. All of them are reserved, which increases the inventory volume.
[0006] The existing means of calculating safety stock, which conducts variable analysis on spare parts' inherent factors, lacks considerations such as single issuance and spare parts base. Once a large number of single issuances occur, the one-time fulfillment rate of spare parts cannot be achieved.
[0007] The existing means of calculating safety stock do not take into account the external factors that affect spare parts, such as the failure of imported spare parts to arrive due to the international environment, the change of spare parts models, etc. These external variables may lead to shortage of spare parts due to insufficient reserves. Summary of the invention
[0008] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a method and system for regulating the reserve quantity of equipment spare parts. Starting from the spare parts' own factors, the quantity to be collected during the procurement cycle is predicted. Starting from the external factors and external factors of the spare parts, the predicted value of the quantity to be collected during the procurement cycle is adjusted to obtain a reasonable spare parts inventory quantity.
[0009] In order to achieve the above object, the present invention adopts the following technical solution:
[0010] A first aspect of the present invention provides a method for controlling the quantity of equipment spare parts reserves, comprising:
[0011] Obtain the inherent factors of spare parts and predict the quantity to be collected during the procurement cycle;
[0012] The external factors of spare parts are obtained, and the spare parts are classified into parts that must be reserved, parts that can be reserved, and parts that may not be reserved; the reasonable reserve quantity of parts that may not be reserved is set to zero; for parts that must be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is the sum of the number of parts issued during the procurement cycle and the single number of parts issued; for parts that can be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is calculated based on the number of parts issued during the procurement cycle, under the premise of ensuring that the equipment is shut down and the production line is not affected; based on the reasonable reserve quantity of spare parts, the reserve quantity of equipment spare parts is regulated.
[0013] Furthermore, for spare parts that can be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts RRS = ES * the quantity issued during the procurement cycle, where ES = ((n-2)a+1) / (n-1)a, n represents the number of equipment installed with the same spare part, and a is the number of equipment that cannot be shut down.
[0014] Furthermore, for accessories that must be stockpiled and accessories that can be stockpiled, if the external factors of spare parts include the discontinuation of spare parts, and the parts cannot be modified or replaced, cannot be directly replaced, or the cost of modification or replacement is higher than the reserve cost, then the difference between the average service life of the equipment and its actual service life will be taken as the procurement cycle, and the quantity to be collected within the procurement cycle will be calculated, and the quantity to be collected within the procurement cycle will be taken as the reasonable reserve quantity of spare parts.
[0015] Furthermore, if the external factors of spare parts include the international environment, the reasonable reserve quantity of spare parts increases by the quantity of spare parts increased by the international environment.
[0016] Furthermore, the spare parts' own factors include procurement cycle, consumption cycle, spare parts base number and spare parts replacement rate;
[0017] The method for calculating the quantity to be used within the procurement cycle is as follows: calculating the ratio of the procurement cycle to the consumption cycle, calculating the ratio of the spare parts base to the spare parts replacement rate, and taking the product of the two ratios as the quantity to be used within the procurement cycle.
[0018] Furthermore, it also includes: if the reasonable inventory quantity of the spare parts is greater than or equal to the spare parts base number, an abnormal warning is issued.
[0019] Furthermore, it also includes: if the product of the reasonable inventory quantity of the spare parts and the purchase unit price is greater than or equal to a certain proportion of the original value of the equipment, an abnormal warning is issued.
[0020] A second aspect of the present invention provides an equipment spare parts reserve quantity control system, which includes:
[0021] The module for calculating the number of requisitions is configured to: obtain the inherent factors of spare parts and predict the number of requisitions within the procurement cycle;
[0022] The reserve quantity control module is configured to: obtain the external factors of spare parts, and classify the spare parts into must-reserve parts, can-reserve parts and optional parts; set the reasonable reserve quantity of optional parts to zero; for must-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is the sum of the number of parts issued during the procurement cycle and the single number of parts issued; for can-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is calculated based on the number of parts issued during the procurement cycle, under the premise of ensuring that the equipment is shut down and the production line is not affected; based on the reasonable reserve quantity of spare parts, the reserve quantity of equipment spare parts is regulated.
[0023] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the method for controlling the reserve quantity of equipment spare parts as described above.
[0024] The fourth aspect of the present invention provides a computer device, including a computer-readable storage medium, a processor, and a computer program stored on the computer-readable storage medium and executable on the processor, wherein when the processor executes the program, the steps in a method for controlling the reserve quantity of equipment spare parts are implemented as described above.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] The present invention starts with the inherent factors of spare parts to predict the quantity of spare parts to be used within a procurement cycle, starts with the external factors and external factors of spare parts to adjust the predicted value of the quantity of spare parts to be used within the procurement cycle, and obtains a reasonable spare parts inventory quantity.
[0027] The present invention also has a function of judging the rationality of the estimated spare parts inventory quantity. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0029] Figure 1 This is a flow chart of a method for controlling the quantity of equipment spare parts reserves according to the first embodiment of the present invention;
[0030] Figure 2 This is a logic judgment diagram of external factors in the first embodiment of the present invention.
[0031] Figure 3This is a model replacement reserve logic flow chart of the first embodiment of the present invention;
[0032] Figure 4 It is a structural diagram of a computer device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION
[0033] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0034] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0035] Embodiment 1
[0036] This embodiment provides a method for controlling the reserve quantity of equipment spare parts.
[0037] In order to effectively control the number of spare parts requests submitted and reserve spare parts reasonably, we start with the relevant influencing variables of the equipment.
[0038] The present embodiment provides a method for regulating the reserve quantity of equipment spare parts. The method is based on a total of twelve variables, including three factors of equipment: external factors (production line shutdown, equipment shutdown and no impact on the production line), internal factors (spare parts base, spare parts replacement rate, purchase unit price, consumption cycle, purchase cycle, single requisition quantity), and external factors (equipment utilization, spare parts shutdown, and international environment). The method uses corresponding mathematical algorithms to make predictive calculations on the reasonable reserve quantity of equipment spare parts, and establishes a spare parts reserve model to regulate the reserve quantity of equipment spare parts. This helps equipment management technicians to make reasonable predictive reserves of equipment spare parts, which can effectively reduce the reserve quantity of spare parts while meeting the spare parts usage of on-site equipment.
[0039] The present embodiment provides a method for controlling the quantity of equipment spare parts reserves, which can improve spare parts management, reduce the generation of idle spare parts, and reduce the capital occupation caused by large reserves of spare parts.
[0040] In order to ensure the normal use of equipment and orderly production, a certain number of accessories (hereinafter referred to as spare parts) need to be reserved. How many spare parts should be reserved to solve equipment failures in a timely manner and minimize accounts receivable and inventory occupancy is the top priority of spare parts reserve work.
[0041] This embodiment provides a method for regulating the reserve quantity of equipment spare parts, which sets the reserve quantity as a reasonable spare parts inventory line. This line includes the safety guarantee that the spare parts reserve quantity cannot be lower than the line, and also includes the cost rationality that the spare parts reserve quantity cannot be higher than the line.
[0042] This embodiment provides a method for regulating the reserve quantity of equipment spare parts, which uses the "three factors and twelve variables" method to calculate the reasonable inventory line of spare parts, as shown in Table 1.
[0043] Table 1. Three-factor twelve-variable table
[0044]
[0045]
[0046] In this embodiment, the reserve quantity of spare parts is hereinafter referred to as RS, and the reasonable reserve quantity of spare parts is hereinafter referred to as RRS.
[0047] This embodiment provides a method for controlling the quantity of equipment spare parts reserves, such as Figure 1 As shown, the following steps are included:
[0048] Step 1: Obtain the inherent factors of spare parts and calculate the spare parts reserve quantity RS.
[0049] Internal factors: determine the spare parts reserve quantity RS.
[0050] Spare parts reserve quantity RS = single-time collection quantity SRQ + (purchase cycle PC / consumption cycle RC) * (spare parts base AB*spare parts replacement rate RRA). The formula consists of three parts, which are explained below: Single-time collection quantity SRQ: To ensure the one-time satisfaction rate, the number of spare parts collected for failures on the same day should be met by inventory. (purchase cycle PC / consumption cycle RC): The number of times spare parts may be collected within the purchase cycle. (spare parts base AB*spare parts replacement rate RRA): The number of spare parts that may be collected each time. (purchase cycle PC / consumption cycle RC) * (spare parts base AB*spare parts replacement rate RRA): The number of spare parts collected within the spare parts purchase cycle.
[0051] Among them, SRQ&PC&RC calculation logic:
[0052] Based on the normal distribution, the historical single-time usage / consumption cycle / purchase cycle data is cleaned to filter out abnormal data. Calculate the standard deviation: σ=sqrt(((x1-x)^2+(x2-x)^2+......(xn-x)^2) / n) and consider data exceeding 3σ as abnormal data.
[0053] Find the expected value of the filtered data, and use this expected value as the calculation value of SRQ / PC / RC: xi represents the historical value, and pi represents the probability of this value.
[0054] Alarm prompt: When n=1, it means that it has only appeared once in history. At this time, whether it is necessary to set a reasonable quantity of spare parts inventory requires additional manual judgment process.
[0055] Among them, AB calculation logic: spare parts base refers to the total number of spare parts installed on all equipment. It needs to be calculated cumulatively based on the equipment configuration.
[0056] Among them, RRA calculation logic: spare parts replacement rate is the ratio of the expected value of spare parts replaced once a year to the spare parts base. Expected value of spare parts replaced once a year: the expected value of the number of spare parts replaced each time within a year.
[0057] Among them, EU: Equipment utilization refers to the running time T of n equipments equipped with a spare part in one year divided by (n*365*24), that is,
[0058] The calculation is based on the existing average annual replacement rate of spare parts from 2021 to 2023 and is associated with the equipment utilization (EU). The spare parts replacement rate in 2024 is predicted and calculated using the least squares formula, and the result is used as the value of RRA in the RS calculation formula. Subsequently, it can be continuously optimized based on the accumulated data, as shown in Table 2.
[0059] Table 2. RRA values
[0060] year 2021 2022 2023 2024 …… RRA R1 R2 R3 R4 …… EU E1 E2 E3 E4 ……
[0061] Assume the formula of the fitting line: R = kE + b.
[0062] The slope of the fitted line is Then use a set of data to calculate the value of b. Finally, substitute the equipment utilization rate E4 in 2024 and calculate the spare parts replacement rate R4 in 2024 as the calculated value of RRA in 2024.
[0063] Step 2: Obtain the external factors of spare parts, classify the spare parts, and determine whether the spare parts are must reserve accessories (MRA), can reserve accessories (CRA), or no reserve accessories (NRA).
[0064] Specifically, foreign factors include: production line shutdown (PLS), equipment shutdown and no impact on the production line (ES), no impact (NE), etc., which can only produce one kind of foreign impact.
[0065] like Figure 2 As shown in the figure, if the external factor of spare parts is production line shutdown (PLS), then spare parts must be reserved; if the external factor of spare parts is equipment shutdown and no impact on the production line (ES), then spare parts can be reserved; if the external factor of spare parts is no impact (NE), then spare parts do not need to be reserved.
[0066] Step 3: Obtain external factors of spare parts, calculate the reasonable spare parts reserve quantity RRS based on spare parts category and spare parts reserve quantity RS.
[0067] Among them, external factors include: equipment utilization (EU), spare parts discontinuation (PD), international environment (IE) and other factors, which may be a single impact or a combination of multiple impacts.
[0068] Among them, the reasonable reserve quantity of spare parts RRS = external factors & internal factors & external factors.
[0069] That is, the reasonable reserve quantity of spare parts
[0070] Right now,
[0071] Step 301: If the external factors of spare parts only include equipment utilization (EU), then:
[0072] (1) For the required spare parts MRA, RRS1 = spare parts reserve quantity RS = single-time requisition quantity SRQ + (purchase cycle PC / consumption cycle RC) * (spare parts base AB * spare parts replacement rate RRA).
[0073] PLS calculation logic: When a production line stops working, it will affect the production order and even cause serious order delivery. At the same time, it will generate waste of additional outsourced labor costs and other expenses. These costs are much higher than the cost of spare parts. Therefore, the number of spare parts required must meet the sum of the number of parts required at one time and the number of replacements during the procurement cycle. At this time, the PLS value is 1, and RRS = RS.
[0074] (2) For spare parts CRA that can be reserved, RRS3 = ES*(PC / RC)*(AB*RRA), where ES is ((n-2)a+1) / (n-1)a, and n represents the number of devices that have the same spare part installed.
[0075] ES calculation logic: It only affects a certain device itself and will not affect the normal production of the production line. However, when the number of equipment shutdowns increases, it will affect production efficiency and even cause poor operation of the production line. Therefore, it is recommended to reserve a certain number of such spare parts. Here, a variable constant a is introduced as the intolerable number of shutdown equipment. It can be seen that a is a positive integer greater than or equal to 2. Use the "minus one rule", that is, ensure that the number of shutdowns is one less than a. (PC / RC)*(AB*RRA) represents the total number of equipment shutdowns due to spare parts damage that may occur during the spare parts procurement cycle. When the number of equipment shutdowns is in different ranges, the corresponding ES values are different, as shown in Table 2.
[0076] Table 2. ES value table
[0077]
[0078] Step 302: Figure 3 As shown in the figure, if the external factors of spare parts only include equipment utilization (EU) and spare parts discontinuation (PD), then determine whether the spare parts can be directly replaced. If so, RRS5=0; otherwise, determine whether the spare parts can be transformed and replaced; if they can be transformed and replaced, then determine whether the prototype spare parts reserve cost is better than the transformation and replacement cost. If so (that is, the original model parts consumption β*PUP within the equipment life < the new model parts consumption β*PUP within the equipment life + transformation cost), then RRS6=β, otherwise, RRS5=0; if they cannot be transformed and replaced, then RRS6=β.
[0079] PD calculation logic: Spare parts discontinuation means that the spare parts installed on the equipment have been discontinued and the spare parts cannot be purchased subsequently.
[0080] Calculation logic of β: Calculate the expected value of the service life cycle data of similar historical equipment, and use this expected value as the average service life (SL) of the equipment. X represents the actual service life of a certain equipment, and P represents the probability of occurrence of the actual service life. Average service life formula: therefore UL (useful life) means useful life.
[0081] Step 303: If the external factors of spare parts only include equipment utilization (EU) and international environment (IE), then: for must-reserve parts MRA, RRS2=RRS1+γ; for can-reserve parts CRA, RRS4=RRS2+γ.
[0082] IE calculation logic: International environment means that due to international reasons, spare parts cannot be purchased in place for a long time. The number of spare parts increased due to this reason γ is not included in the total number of spare parts to determine whether it exceeds RRS. When the international reasons are alleviated, it is added to the total number of spare parts for consumption. Set the spare parts consumption in a one-year cycle ≤γ≤β, that is when , γ=β.
[0083] Step 304: No reserve accessories (NRA), RRS is 0.
[0084] Step 4: Summarize the formula for reasonable spare parts inventory quantity.
[0085] For different spare parts, different calculation formulas need to be selected under different factors to calculate the reasonable inventory quantity. The calculated inventory quantity is subtracted from the existing inventory, and corresponding purchase or consumption suggestions are submitted. At the same time, abnormal warnings are issued for three abnormal situations.
[0086] (1) n = 1. There has only been one record of spare parts being used in history. The technical manager needs to analyze whether to set a reasonable inventory quantity for spare parts.
[0087] (2) RRS ≥ AB, the reasonable inventory quantity of spare parts is greater than or equal to the spare parts base, indicating that there is a problem in setting the reasonable inventory quantity.
[0088] (3) PUP*RRS ≥ 1% of the original value of the equipment. The spare parts inventory cost is greater than or equal to 1% of the original value of the equipment. The technical manager needs to analyze the reasonable inventory quantity or unit price.
[0089] The present embodiment provides a method for regulating the reserve quantity of equipment spare parts. Starting from the external factors, internal factors and external factors of the equipment, the spare parts reserve strategy, reserve quantity strategy and adjustment coefficient strategy are scientifically determined, and a reasonable spare parts inventory quantity is calculated with the help of mathematical algorithms.
[0090] The present embodiment provides a method for controlling the equipment spare parts reserve quantity, which also has a rationality judgment function for the estimated spare parts inventory quantity.
[0091] Embodiment 2
[0092] This embodiment provides a system for controlling the quantity of equipment spare parts reserves, which specifically includes:
[0093] The module for calculating the number of requisitions is configured to: obtain the inherent factors of spare parts and predict the number of requisitions within the procurement cycle;
[0094] The reserve quantity control module is configured to: obtain the external factors of spare parts, and classify the spare parts into must-reserve parts, can-reserve parts and optional parts; set the reasonable reserve quantity of optional parts to zero; for must-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is the sum of the number of parts issued during the procurement cycle and the single number of parts issued; for can-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is calculated based on the number of parts issued during the procurement cycle, under the premise of ensuring that the equipment is shut down and the production line is not affected; based on the reasonable reserve quantity of spare parts, the reserve quantity of equipment spare parts is regulated.
[0095] For spare parts that can be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts RRS = ES * the quantity issued during the procurement cycle, where ES = ((n-2)a+1) / (n-1)a, n represents the number of equipment installed with the same spare part, and a is the number of equipment that cannot be shut down.
[0096] Among them, the inherent factors of spare parts include procurement cycle, consumption cycle, spare parts base and spare parts replacement rate;
[0097] The calculation method of the quantity collected during the procurement cycle is as follows: calculate the ratio of the procurement cycle to the consumption cycle, calculate the ratio of the spare parts base to the spare parts replacement rate, and use the product of the two ratios as the quantity collected during the procurement cycle.
[0098] For spare parts that must be stockpiled and spare parts that can be stockpiled, if the external factors of spare parts include the discontinuation of spare parts production and the inability to be modified or replaced, the inability to be directly replaced, or the cost of modification or replacement is higher than the reserve cost, then the difference between the average service life of the equipment and its actual service life will be taken as the procurement cycle, and the quantity to be collected within the procurement cycle will be calculated, and the quantity to be collected within the procurement cycle will be taken as the reasonable reserve quantity of spare parts.
[0099] Among them, if the external factors of spare parts include the international environment, the reasonable reserve quantity of spare parts will increase by the number of spare parts increased due to the international environment.
[0100] Among them, if the reasonable inventory quantity of the spare parts is greater than or equal to the spare parts base number, an abnormal warning is issued.
[0101] Among them, if the product of the reasonable inventory quantity of the spare parts and the purchase unit price is greater than or equal to a certain proportion of the original value of the equipment, an abnormal warning is issued.
[0102] The present embodiment provides a system for regulating the reserve quantity of equipment spare parts. The system is based on a total of twelve variables, including three factors of the equipment: external factors (production line shutdown, equipment shutdown and no impact on the production line, no impact), internal factors (spare parts base, spare parts replacement rate, purchase unit price, consumption cycle, purchase cycle, single requisition quantity), and external factors (equipment utilization, spare parts shutdown, and international environment). The system uses corresponding mathematical algorithms to make predictive calculations on the reasonable reserve quantity of equipment spare parts, and establishes a spare parts reserve model to regulate the reserve quantity of equipment spare parts. This helps equipment management technicians to make reasonable predictive reserves of equipment spare parts, which can effectively reduce the reserve quantity of spare parts while meeting the spare parts usage of on-site equipment.
[0103] The present embodiment provides a system for regulating the reserve quantity of equipment spare parts. Starting from the inherent factors of spare parts, the system predicts the quantity to be collected during the procurement cycle. Starting from the external factors of spare parts, the system adjusts the predicted value of the quantity to be collected during the procurement cycle to obtain a reasonable spare parts inventory quantity.
[0104] The equipment spare parts reserve quantity control system provided in this embodiment also has a rationality judgment function for the estimated spare parts inventory quantity.
[0105] It should be noted here that each module in this embodiment corresponds to each step in Example 1 one by one, and the specific implementation process is the same, which will not be repeated here.
[0106] Embodiment 3
[0107] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the method for controlling the reserve quantity of equipment spare parts as described in the first embodiment above are implemented.
[0108] Embodiment 4
[0109] This embodiment provides a computer device, such as Figure 4 As shown, it includes a computer-readable storage medium 1003, a processor 1001, a communication interface 1002, and a computer program stored on the computer-readable storage medium 1003 and executable on the processor 1001, wherein the processor 1001, the communication interface 1002, and the computer-readable storage medium 1003 can be connected via a bus or other means. The communication interface 1002 is used to receive and send data, and when the processor 1001 executes the program, the steps in the method for controlling the reserve quantity of equipment spare parts as described in the first embodiment are implemented.
[0110] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0111] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.
[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.
[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A method for controlling the quantity of equipment spare parts reserves, characterized in that: include: Obtain the inherent factors of spare parts and predict the quantity to be collected during the procurement cycle; The external factors of spare parts are obtained, and the spare parts are classified into parts that must be reserved, parts that can be reserved, and parts that may not be reserved; the reasonable reserve quantity of parts that may not be reserved is set to zero; for parts that must be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is the sum of the number of parts issued during the procurement cycle and the single number of parts issued; for parts that can be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is calculated based on the number of parts issued during the procurement cycle, under the premise of ensuring that the equipment is shut down and the production line is not affected; based on the reasonable reserve quantity of spare parts, the reserve quantity of equipment spare parts is regulated.
2. A method for controlling the quantity of equipment spare parts reserves as claimed in claim 1, characterized in that: For spare parts that can be reserved, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts RRS = ES * the quantity issued during the procurement cycle, where ES = ((n-2)a+1) / (n-1)a, n represents the number of equipment installed with the same spare part, and a is the number of equipment that cannot be shut down.
3. A method for controlling the quantity of equipment spare parts reserves as claimed in claim 2, characterized in that: For spare parts that must be stockpiled and spare parts that can be stockpiled, if the external factors of spare parts include the discontinuation of spare parts production and the inability to be modified or replaced, the inability to be directly replaced, or the cost of modification or replacement is higher than the reserve cost, then the difference between the average service life of the equipment and its actual service life will be taken as the procurement cycle, and the quantity to be collected within the procurement cycle will be calculated, and the quantity to be collected within the procurement cycle will be taken as the reasonable reserve quantity of spare parts.
4. A method for controlling the quantity of equipment spare parts reserves as claimed in claim 3, characterized in that: If the external factors of spare parts include the international environment, the reasonable reserve quantity of spare parts will increase by the amount of spare parts increased due to the international environment.
5. A method for controlling the quantity of equipment spare parts reserves according to any one of claims 1 to 4, characterized in that: The inherent factors of the spare parts include the purchasing cycle, consumption cycle, spare parts base and spare parts replacement rate; The method for calculating the quantity to be used within the procurement cycle is as follows: calculating the ratio of the procurement cycle to the consumption cycle, calculating the ratio of the spare parts base to the spare parts replacement rate, and taking the product of the two ratios as the quantity to be used within the procurement cycle.
6. A method for controlling the quantity of equipment spare parts reserves according to any one of claims 1 to 4, characterized in that: Also includes: If the reasonable inventory quantity of the spare parts is greater than or equal to the spare parts base number, an abnormal warning is issued.
7. A method for controlling the quantity of equipment spare parts reserves according to any one of claims 1 to 4, characterized in that: Also includes: If the product of the reasonable inventory quantity of the spare parts and the purchase unit price is greater than or equal to a certain proportion of the original value of the equipment, an abnormal warning will be issued.
8. A system for controlling the quantity of equipment spare parts reserves, characterized in that: include: The module for calculating the number of requisitions is configured to: obtain the inherent factors of spare parts and predict the number of requisitions within the procurement cycle; The reserve quantity control module is configured to: obtain the external factors of spare parts, and classify the spare parts into must-reserve parts, can-reserve parts and optional parts; set the reasonable reserve quantity of optional parts to zero; for must-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is the sum of the number of parts issued during the procurement cycle and the single number of parts issued; for can-reserve parts, if the external factors of spare parts only include equipment utilization, then the reasonable reserve quantity of spare parts is calculated based on the number of parts issued during the procurement cycle, under the premise of ensuring that the equipment is shut down and the production line is not affected; based on the reasonable reserve quantity of spare parts, the reserve quantity of equipment spare parts is regulated.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in a method for controlling the reserve quantity of equipment spare parts as described in any one of claims 1 to 7 are implemented.
10. A computer device comprising a computer-readable storage medium, a processor, and a computer program stored in the computer-readable storage medium and executable on the processor, characterized in that: When the processor executes the program, the steps of a method for controlling the reserve quantity of equipment spare parts as described in any one of claims 1-7 are implemented.