Demand is Normally distributed with a mean of 66 per week and a weekly variance of 3.  The ordering cost is $57.5.  Lead time is 8 weeks. Shortages cost an estimated $4.14 per unit short to expedite orders to appease customers. The holding cost is $7.06 per week. Estimate the stockout risk if the target service level is 0.22.

Purchasing and Supply Chain Management
6th Edition
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Chapter16: Lean Supply Chain Management
Section: Chapter Questions
Problem 10DQ: The chapter presented various approaches for the control of inventory investment. Discuss three...
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1. Demand is Normally distributed with a mean of 66 per week and a weekly variance of 3.  The ordering cost is $57.5.  Lead time is 8 weeks. Shortages cost an estimated $4.14 per unit short to expedite orders to appease customers. The holding cost is $7.06 per week.

Estimate the stockout risk if the target service level is 0.22.

2.

Demand is Normally distributed with a mean of 43 per week and a weekly variance of 8.  The ordering cost is $83.26.  Lead time is 4 weeks. Shortages cost an estimated $1.96 per unit short to expedite orders to appease customers. The holding cost is $9.2 per week.

Calculate ROP if the target service level is 95%.

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