Operations and Supply Chain Management 9th edition
Operations and Supply Chain Management 9th edition
9th Edition
ISBN: 9781119320975
Author: Roberta S. Russell, Bernard W. Taylor III
Publisher: WILEY
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Chapter 5, Problem 17Q

a)

Summary Introduction

To determine: Whether the given statement is true or false.

b)

Summary Introduction

To determine: Whether the given statement is true or false.

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Customers arrive randomly to an airport shoe-shine stand at a rate of 8 per hour. The average length of a shoe shine is 12 minutes. There are two attendants. Arriving customers who find both chairs occupied by other customers will wait only if NO customers are waiting. Assume that service times are exponentially distributed and that the calling population is infinite. (a) VWhat is the queuing model? (b) To the nearest third decimal place, what is the expected total time in steady state that a customer spends at the stand? O (M/M/2): (GD/2/infınity), 18.333 minutes O (M/G/2): (GD/infinity/infinity), 0.467 hours none of the other choices O (M/M/2) : (GD/3/infinity), 0.233 hours
1.)The arrival rate is the     rate of arrivals to the service facility     all of these     rate items arrive at the server after being in the queue     time between arrivals to the service facility 2.) what is "queue discipline"?
Netflix is a DVD movie rental company. They stock 50 DVDs of a recent blockbuster movie available for rental. Their rental fee is $4 per DVD per day. The inter-arrival time between rental requests for this movie is 2.5 hours, on average, with a standard deviation of 2.5 hours. Demand is steady throughout a 24-hour day (there is no evidence of other arrival patterns). Assume that if all copies of the DVD are rented, then customers are willing to wait for the next one to become available. Also, assume shipping is instantaneous (the shipping time is zero days). A DVD is rented, on average, for 5 days with a standard deviation of 3 days. What is the average number of unrented DVDs in Netflix’s warehouse? Hint: consider the average utilization.

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Operations and Supply Chain Management 9th edition

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