Production plan change-oriented multi-objective constraint material substitution method

Abstract

The invention discloses a production plan change-oriented multi-objective constraint material substitution method, which comprises the following steps: 1, establishing a material substitution model; 2, establishing a material substitution algorithmic rule; and 3, performing an analysis and decision process of substitute material selection. According to the production plan change-oriented multi-objective constraint material substitution method disclosed by the invention, by aiming at material requirement coordination among a product bill of materials (BOM), a process BOM and a plan BOM, which is involved by the material substitution problem emerging in complex equipment due to a task change during an assembly production process, a multi-constraint and multi-objective-oriented material substitution model is established, and meanwhile, according to different attribute characteristics (a design characteristic, a process characteristic and a plan characteristic) of materials to be used as constrained parameters of material substitution, a substitute algorithm of the selection of different material substitutes so as to realize material section, matching and substitution among products, and therefore, the supply-demand relationship balance between substitute materials and product requirements under the assembly constraint environment of design, the process, the task change and resource capability and the like is guaranteed, on-hand inventory parts or parts expected to arriving in the future are reasonably distributed to meet the kitting requirements, and the goal that the total cost is minimized is achieved.

Description

Technical field [0001] The invention relates to a method for replacing multi-objective constrained materials for production plan changes. Background technique [0002] Due to the huge volume of large equipment products, the cost of disassembly and lost work for large or main components is high. Generally, try to avoid the unconventional product stagnation and backlog caused by lack of parts at the work station, and ensure zero before the corresponding assembly process. The complete set of parts is ready, so substitute parts are often used in complex equipment to solve the problem of missing parts. The substitution of materials between different tasks in the production process involves the coordination of material requirements between product BOM (Bill of Material), process BOM, and planned BOM. At the same time, the selection of replacement parts also needs to consider different attributes and characteristics of materials, including Design features, process features and planning...

AI Technical Summary

Problems solved by technology

If most of the supply of p' is used to substitute for part p, then some other assembly demand may not be met leading to an infeasible schedule

[0012] The problem of material substitution is ubiquitous in industrial production, but literature has proved that this kind of problem is a NP (Non-Deterministic Polynomial, non-deterministic polynomial) problem, and there are quite few studies on this problem abroad

At present, there is no domestic research record in this area

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