Article ID: | iaor201527525 |
Volume: | 88 |
Issue: | 4 |
Start Page Number: | 386 |
End Page Number: | 394 |
Publication Date: | Oct 2015 |
Journal: | Computers & Industrial Engineering |
Authors: | Nasri Farrokh, Paknejad Javad, Affisco John F |
Keywords: | inventory, inventory: order policies, simulation |
This paper reports the results of an investigation of a set of continuous time, constant demand inventory models under the condition of yield uncertainty. Specifically, the impact of yield improvement programs on lot size, backorder level, and the resulting costs are examined. Models for improving yield rate and reducing yield variability are developed and examined through a series of numerical exercises. In addition, a model for the simultaneous improvement of yield rate and yield variability is presented for the case where there is a relationship between the mean and variance of the yield distribution. In all cases, investment programs improve the picture with respect to manufacturing yield for processes which are not necessarily under statistical control.