Evaluation of Product Process Planning Schemes for Green Manufacturing

In view of the uncertainty and incompatibility in the product process planning scheme evaluation under the background of green manufacturing, an evaluation method of product process planning scheme was proposed based on extension analysis and D-S theory. According to the extension analysis theory, the classical domain matter element matrix, the joint domain matter element matrix and the matter element matrix to be evaluated of product process planning scheme evaluation problem were established, and the correlation function matrix of the matter element matrix to be evaluated was obtained. The identification framework of D-S theory was established after conversion processing and the correlation function matrix in extension analysis was extended to the basic probability assignment(BPA) function matrix in D-S theory. The CRITIC method, which combined the contrast strength and conflict, was used to calculate the importance degree of each feature. The evidences were fused considering the feature importance degree. According to the BPA function values after fusion, the process planning schemes were analyzed and compared. Finally, the classification results of multiple process planning schemes and the ranking relations of the same level schemes were obtained. The effectiveness of the proposed method was verified by an example of an automobile rear door frame process planning scheme evaluation. © 2019, China Mechanical Engineering Magazine Office. All right reserved.