제조 및 재제조 설비로 구성된 혼합 생산시스템에서의 용량 및 생산계획

Abstract

This study considers capacity and production planning in a hybrid system with two product supply channels, i.e., manufacturing facility that produces new products and remanufacturing facility that produces like-new products by reprocessing end-of-use/life products. The integrated problem is to determine capacity requirements and production quantities at both manufacturing and remanufacturing facilities to satisfy the demands over a given planning horizon. In particular, we consider the budget constraint that limits the amount of capacity change costs required over the planning horizon. The objective is to minimize the total cost, i.e., sum of shutdown, production (setup and operation), inventory holding and subcontracting costs. To represent the problem mathematically, a mixed integer programming model is suggested. Then, due to the problem complexity, we suggest two linear programming relaxation based heuristics, each of which fixes binary variables systematically using a certain procedure. Computational experiments were done on a number of test instances, and the test results are reported.