Process path priority calculation method for plan scheduling system
By writing hard constraint tables and soft constraint tables in the planned scheduling system, calculating process path scores, and automatically selecting the optimal production path, the problem of difficult to solve the optimal path in multi-process path production is solved, and resource optimization configuration and production efficiency improvement are achieved.
Patent Information
- Application Number
- CN202510157252.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-05-16
AI Technical Summary
The prior art is difficult to automatically solve the optimal production path in multi-process path production, and cannot adapt to real-time changes, resulting in unoptimized resource allocation and low production efficiency.
By writing hard constraint tables and soft constraint tables in the planned scheduling system, the process path availability is judged based on sales order parameters, and the final score of the process path is calculated by additional points, and the process path with the highest score is automatically selected as the optimal production path.
It realizes the optimal allocation of resources, improves production efficiency, shortens production cycles, and reduces product-in-process inventory.
Smart Images
Figure CN120013190A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of metallurgical control, and in particular to a method for calculating process path priority in a planning and scheduling system. Background Art
[0002] The planning and scheduling system is an important part of production management and operation management. It optimizes resource utilization, improves production efficiency and reduces costs by rationally allocating and sequencing production tasks. In the manufacturing industry, the production of a product often requires multiple processes, and each process may have a variety of different processing methods (i.e., process paths). Therefore, how to set priorities for different process paths according to actual production conditions to ensure efficient and smooth production is a key issue that the planning and scheduling system needs to solve.
[0003] With the rapid development of science and technology, market demand continues to grow, new technologies and new processes continue to emerge, and enterprises need to improve production efficiency to meet market demand. Planning and scheduling the optimal path production has become one of the important means for enterprises to improve production efficiency. Therefore, the method of calculating the priority of the process path is to determine a rule and algorithm for the optimal path production, formulate the optimal production master plan, improve production efficiency, reduce costs, and improve product quality. Summary of the invention
[0004] In view of the shortcomings of the prior art, the present invention provides a method for calculating the priority of process paths in a planning and scheduling system. The method is formulated to solve the problem that the optimal production path cannot be automatically solved for multi-process path production in product production. The final score of each process path is calculated according to the set process path scoring items, and the process path with the highest score is selected as the current optimal process path. The process path priority method solves the problem that traditional process path selection methods cannot adapt to real-time changes through scientific quantitative analysis and dynamic adjustment, provides effective technical support for the production management of enterprises, and realizes the optimal allocation of resources and the maximization of production efficiency.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for calculating the priority of a process path in a planning and scheduling system, when formulating a production plan according to customer demand, for products with multiple process paths, the selection of the optimal production path specifically includes the following steps:
[0006] S1. Write a hard constraint table, and maintain the following contents: sales factory ID, product category, production line allowable width range, production line allowable thickness range, processing line available equipment, allowable mark, reason description, etc.
[0007] S2. Prepare a soft constraint table, and maintain the following contents: sales factory ID, product category, steel grade group, product steel grade, whether to trim, factory ID of each process, width range, thickness range, available equipment for processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, reason description, etc.
[0008] S3. The planning system specifies the sales order to start the production master plan creation phase. For products produced by multiple process paths, the system reads data from the hard constraint table based on the sales order parameters, and determines in turn whether all process paths under the sales order are available, and determines the optionality of the process paths.
[0009] S4. The planning system specifies the sales order to carry out the production master plan creation stage. According to the parameters of the sales order, the additional subset is screened from the soft constraint table, and the score of the optional process path is calculated together with the sum of the initial score setting values of each path of the multiple process paths under the sales order to determine the optimal production process path.
[0010] The evaluation score of the process path is as follows:
[0011]
[0012] Among them: S: evaluation score
[0013] s0: initial evaluation score
[0014] n: the number of additional points in the query set
[0015] s n : nth additional points
[0016] S5. When the planning system specifies a sales order to create a production master plan, it can automatically select the process path with the highest score to create a master plan and break down the optimal piece-by-piece production plan. Customers can change and maintain the soft and hard tables in the interface.
[0017] Preferably, in step S1, a hard constraint table is compiled according to the sales factory ID, product category, allowable width range of the production line, allowable thickness range of the production line, available equipment of the processing line, permission flag, and reason description.
[0018] Preferably, in step S2, a soft constraint table is compiled according to the sales factory ID, product category, steel grade group, product steel grade, whether to trim, factory ID of each process, width range, thickness range, available equipment for the processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, and reason description.
[0019] Preferably, in step S3, when the planning and scheduling system generates a sales order, it reads data from the hard constraint table according to the parameters of the sales order, and determines in turn whether all process paths under the sales order are available. If available, the available flag is set to T, otherwise it is set to F.
[0020] Preferably, in step S4, an initial evaluation score is set for each path under the sales order. When the planning and scheduling system generates a sales order, an additional score set is read from the soft constraint table according to the parameters of the sales order. The additional score is allowed to be a positive or negative number. The additional score is accumulated on the basis of the initial evaluation score, and the evaluation scores of all available process paths under the sales order are calculated in sequence.
[0021] The present invention provides a method for calculating the priority of process paths in a planning and scheduling system.
[0022] Beneficial effects:
[0023] 1. The present invention provides a method for calculating the priority of a process path in a planning and scheduling system. By setting the soft and hard constraints of the order on the production path before and after and the path priority score, the optimal production process path is automatically calculated in combination with the actual resource utilization. The planning system automatically schedules production and disassembles the process plan according to the setting of the optimal path, thereby improving equipment utilization, improving production efficiency, shortening the production cycle and reducing work-in-process inventory. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall workflow of the present invention;
[0025] Figure 2 This is an example diagram of the hard constraint table of the present invention;
[0026] Figure 3 This is an example diagram of the soft constraint representation of the present invention;
[0027] Figure 4 Schematic representation of the path 1 parameters of the present invention;
[0028] Figure 5 Schematic representation of path 2 parameters of the present invention;
[0029] Figure 6 Schematic representation of path 3 parameters of the present invention;
[0030] Figure 7 This is a schematic diagram of data found in the hard constraint table by path 2 of the present invention;
[0031] Figure 8 A schematic diagram of sales order parameters corresponding to path 1 and path 2 of the present invention;
[0032] Fig. 9This is a schematic diagram of the results found in the soft constraint table for path 1 and path 3 of the present invention. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] like Figure 1 As shown, an embodiment of the present invention provides a method for calculating the priority of a process path in a planning and scheduling system, comprising the following steps:
[0035] S1. Write a hard constraint table, and maintain the following contents: sales factory ID, product category, production line allowable width range, production line allowable thickness range, processing line available equipment, allowable mark, reason description, etc.
[0036] S2. Prepare a soft constraint table, and maintain the following contents: sales factory ID, product category, steel grade group, product steel grade, whether to trim, factory ID of each process, width range, thickness range, available equipment for processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, reason description, etc.
[0037] S3. The planning system specifies the sales order to start the production master plan creation phase. For products produced by multiple process paths, the system reads data from the hard constraint table based on the sales order parameters, and determines in turn whether all process paths under the sales order are available, and determines the optionality of the process paths.
[0038] Create a hard constraint table to determine whether the path is available. The table format of the hard constraint table is as follows: Figure 2 shown.
[0039] A sales order contains multiple process paths. When the planner creates a production plan based on the sales order, the system searches for data that satisfies the path from the hard constraint table for each of these paths. If found, the available flag of the path is assigned the found value, otherwise the default value T is used.
[0040] S4. The planning system specifies the sales order to carry out the production master plan creation stage. According to the parameters of the sales order, the additional subset is screened from the soft constraint table, and the score of the optional process path is calculated together with the sum of the initial score setting values of each path of the multiple process paths under the sales order to determine the optimal production process path.
[0041] Create a soft constraint table to determine whether the path has bonus or deduction items.
[0042] The parameter values required for the production and sales process of the cold rolling process are studied. Combined with the planner's operating experience, the sales factory ID, product category, steel grade group, product steel grade, whether to trim, each process factory ID, width range, thickness range, available equipment for the processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, reason description and other parameters are selected as items of the soft constraint table. The table format is as follows: Figure 3 shown.
[0043] A sales order contains multiple process paths. When the planner creates a production plan based on the sales order, the system queries the soft constraint table for these paths respectively, finds the data set that satisfies the path, obtains each additional point, and accumulates the additional points on the basis of the initial evaluation score of 100 as the final evaluation score. If no data is found, the final evaluation score is 100.
[0044] S5. When the planning system specifies a sales order to create a production master plan, it can automatically select the process path with the highest score to create a master plan and break down the optimal piece-by-piece production plan. Customers can change and maintain the soft and hard tables in the interface.
[0045] When the planner selects a sales order to create a plan on the interface, the process path with the highest evaluation score is automatically selected. The planner can also add, delete or modify tables on the maintenance interface to meet production needs.
[0046] A sales order contains three process paths, and the parameters corresponding to each path are as follows: Figure 4 , 5 , 6:
[0047] According to the parameters corresponding to each path, the hard table is queried. Path 1 and Path 3 do not find matching data. The available flag is set to the default value T. Path 2 finds matching data, such as Figure 7 :
[0048] from Figure 7 It can be seen that since the upper limit of the width of the five-galvanizing production line corresponding to path 2 is 1300mm, and the product width required by the sales order is 1335mm, which exceeds the upper limit of the five-galvanizing width, the path is not available and the available flag is set to F.
[0049] The sales order parameters corresponding to path 1 and path 3 are as follows: Figure 8 :
[0050] According to the parameters corresponding to path 1 and path 3, the search is performed in the soft table, and the results found are as follows Fig. 9 ,from Fig. 9 As can be seen from the figure, path 1 found three sets of data that met the conditions in the soft constraint table and obtained three additional points. Therefore, the evaluation score of path 1 is S = S0 + S1 + S2 + S3 = 100 + 10 + 8 + 0.5
[0051] =118.5, path 3 only found one set of data, so the evaluation score of path 3 is S=S0+S1=100+0.5=100.5. According to the evaluation score, it can be determined that path 1 has the highest priority. When the planner creates a plan, the system automatically selects path 1 for creation.
[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for calculating process path priority in a planning and scheduling system, characterized by: When making a production plan based on customer demand, the selection of the optimal production path for products with multiple process paths includes the following steps: S1. Write a hard constraint table, and maintain the following contents: sales factory ID, product category, production line allowable width range, production line allowable thickness range, processing line available equipment, allowable mark, reason description, etc. S2. Prepare a soft constraint table, and maintain the following contents: sales factory ID, product category, steel grade group, product steel grade, whether to trim, factory ID of each process, width range, thickness range, available equipment for processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, reason description, etc. S3. The planning system specifies the sales order to start the production master plan creation phase. For products produced by multiple process paths, the system reads data from the hard constraint table based on the sales order parameters, and determines in turn whether all process paths under the sales order are available, and determines the optionality of the process paths. S4. The planning system specifies the sales order to carry out the production master plan creation stage. According to the parameters of the sales order, the additional subset is screened from the soft constraint table, and the score of the optional process path is calculated together with the sum of the initial score setting values of each path of the multiple process paths under the sales order to determine the optimal production process path. The evaluation score of the process path is as follows: Among them: S: evaluation score s0: initial evaluation score n: the number of additional points in the query set s n : nth additional points S5. When the planning system specifies a sales order to create a production master plan, it can automatically select the process path with the highest score to create a master plan and break down the optimal piece-by-piece production plan. Customers can change and maintain the soft and hard tables in the interface.
2. The method for calculating process path priority in a planning and scheduling system according to claim 1, characterized in that: In the step S1, a hard constraint table is compiled according to the sales factory ID, product category, production line allowable width range, production line allowable thickness range, processing line available equipment, permission flag, and reason description.
3. The method for calculating process path priority in a planning and scheduling system according to claim 1, characterized in that: In step S2, a soft constraint table is compiled according to the sales factory ID, product category, steel grade group, product steel grade, whether to trim, factory ID of each process, width range, thickness range, available equipment for the processing line, customer, surface quality, surface treatment, zinc layer thickness range, additional points, and reason description.
4. The method for calculating process path priority in a planning and scheduling system according to claim 1, characterized in that: In step S3, when the planning and scheduling system generates a sales order, it reads data from the hard constraint table according to the parameters of the sales order, and determines in turn whether all process paths under the sales order are available. If available, the available flag is set to T, otherwise it is set to F.
5. The method for calculating process path priority in a planning and scheduling system according to claim 1, characterized in that: In step S4, an initial evaluation score is set for each path under the sales order. When the planning and scheduling system generates a sales order, an additional score set is read from the soft constraint table according to the parameters of the sales order. The additional score is allowed to be a positive or negative number. The additional score is accumulated on the basis of the initial evaluation score, and the evaluation scores of all available process paths under the sales order are calculated in sequence.