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

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.