Materials Requirement Programming in a job shop environment using a resource constrained project scheduling model

Materials Requirement Programming in a job shop environment using a resource constrained project scheduling model

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Article ID: iaor2004986
Country: United Kingdom
Volume: 30
Issue: 4
Start Page Number: 275
End Page Number: 286
Publication Date: Aug 2002
Journal: OMEGA
Authors: , ,
Keywords: scheduling
Abstract:

One of the most difficult tasks in a job shop manufacturing environment is to balance schedule and capacity in an ongoing basis. MRP systems are commonly used for scheduling, although their inability to deal with capacity constraints adequately is a severe drawback. In this study, we show that material requirements planning can be done more effectively in a job shop environment using a resource constrained project scheduling model. The proposed model augments MRP models by incorporating capacity constraints and using variable lead time lengths. The efficacy of this approach is tested on MRP systems by comparing the inventory carrying costs and resource allocation of the solutions obtained by the proposed model to those obtained by using a traditional MRP model. In general, it is concluded that the proposed model provides improved schedules with considerable reductions in inventory carrying costs.

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