Adjusting Replenishment Orders to Reflect Learning in a Material Requirements Planning Environment

Larry R. Dolinsky, Thomas E. Vollmann and Michael J. Maggard
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Larry R. Dolinsky: Operations Management Department, Bentley College, Waltham, Massachusetts 02154-4705
Thomas E. Vollmann: School of Management, Boston University, Boston, Massachusetts 02215
Michael J. Maggard: College of Business Administration, Northeastern University, Boston, Massachusetts 02254

Management Science, 1990, vol. 36, issue 12, 1532-1547

Abstract: Some manufacturing firms, particularly in the high-technology sector, have production processes which are characterized by very low initial yields followed by steady "experience" based yield improvement. Material Requirements Planning literature reveals that MRP implementations are seldom adjusted in any systematic way to account for such yield improvement. A single product, single stage MRP model is developed which incorporates learning curve behavior into conventional MRP logic. A series of experiments systematically examine the impact on mean inventory level of various combinations of environmental conditions and managerial policies. The research demonstrates that substantial reductions in mean inventory levels can be realized in low yield environments if learning is properly included in the order release logic. This finding proves to be robust with respect to modest errors in the estimation of learning rate.

Keywords: material requirements planning; experience curve; learning curve; production yield; scrap rate; lot sizing (search for similar items in EconPapers)
Date: 1990
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