An Integrated Model of Allocating Operational Tolerances and Minimizing Lateness in a Discrete Part Job Shop Environment

摘要

Many researchers found that original process plans are being modified in practice in order to accommodate changes in the shop floor. These modifications are typically carried out by non-professional process planners and eventually lead to a conflict between scheduling activities and process planning functions. Products going out of dimensioning during production are a main cause of process planning infeasibility. This paper introduces an integrated model that simultaneously serves three purposes: allocating operational tolerances, minimizing products lateness, and figuring operation-machines assignments. The results demonstrated by an example proved the effectiveness of the proposed approach.