Integrating production scheduling and Material Requirements Planning

Abstract

This paper addresses a technique to integrate the production scheduling andMaterial Requirements Planning (MRP). Generally, generating MRP considers onlyBill of Materials (BOM) not capacity constraints and operating sequences leadingto an in-feasible production plan when scheduling is actually performed next onshop-floor. That is why most researchers recently turn attention to executingboth simultaneously. Our technique uses the advantage of an integer linearprogramming model to plan and schedule at once so that the capacity constraintsand operating sequences are not ignored. The objective function of the proposedmodel includes both planning and scheduling purposes that is to minimize totalinventory costs and order's tardiness. Significant and inevitable concerns whenseparately generating MRP and schedule are all included in the model throughseveral constraints. Numerical results verify that this model can be used tosimultaneously generate reasonable MRP as well as feasible and optimal schedule.ICIC International © 2009.