Production and Operations Analysis, Seventh Edition
Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 5, Problem 31AP

a)

Summary Introduction

Concept introduction:lead time is τ known as constant. Lead time uncertainty is common in practice. Lead time are independent random variable. The variability of lead time can be easily incorporate into the analysis.

b)

Summary Introduction

Concept introduction:lot size -reorder point system relies on the assumption that inventories are renewed continuous rate then periodically that is the state of the system is always known.

c)

Summary Introduction

Concept introduction:the new vendor model is appropriate for a problem that essentially restarts from scratch every period.newspaper has no value in the market. Same for three possible scrap value of the paper itself.

d)

Summary Introduction

Concept introduction: ABC classification system is one of the ranking items. Items are sequenced in decreasing order of annual dollar volume of sales or usage.

e)

Summary Introduction

Concept introduction:the extension of EOQ is also known as finite production rate model. Key random variable demand during the lead time.

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Answer the following true or false.a. The lead time is always less than the cycle time.b. The optimal lot size for a Type 1 service objective of X percent is always less than the optimal lot size for a Type 2 service objective of X percent for the same item.c. The newsvendor model does not include a fixed order cost.d. ABC analysis ranks items according to the annual value of their demand.e. For a finite production rate model, the optimal lot size to produce each cycle is equal to the maximum inventory each cycle.
With a probabilistic​ model, increasing the service level     A. will decrease the level of safety stock level.   B. will increase the cost of the inventory holding.   C. will have no impact on the cost of the inventory policy.   D. will reduce the cost of the inventory holding.
Demand in each period follows the same normal distribution (i.e., there is one demand distribution that represents demand in any single period). Assuming demand is independent acrossperiods, which of the following statements about mean demand over five periods is true? a. It equals the mean of demand over one period.b. It is greater than the mean of demand over one period but less than five times the meanof demand over one period.c. It equals five times the mean of demand over one period.d. It is even more than five times the mean of demand over one period.
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