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 7.4, Problem 19P
Summary Introduction

interpretation: time spending by the customers in the checkout process (queuing and being served).

concept introduction: queueing theory is the science of waiting line processes. Virtually all the results in queueing theory assume that both the arrival and service processes are random. The interaction between these two processes makes queueing an interesting and challenging area

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A supermarket manager notices that there are 20 customers at the checkouts andalso knows that arrivals to the checkout at that time of day are at a rate of abouttwo per minute. About how long are customers spending in the checkout process(queueing and being served) on average?
. Cranston Cranberry Cooperative (CCC) processes cranberries that are harvested in thelocal area. Barrels of cranberries arrive on trucks to CCC’s facility at a rate of 150barrels per hour and are processed continuously at a rate of 100 barrels per hour.Trucks arrive at a uniform rate over eight hours, from 6:00 a.m. until 2:00 p.m.How long does a truck wait, on average, before it is processed?
The Petroco Service Station has one pump for regular unleaded gas, which (with an attendant) can service 15 customers per minute . Cars arrive at the regular unleaded pump at a rate of 12 per minute Determine the average queue length, The average number of car in the queuing system, the average time a car is in the system, and the average time a car must wait.
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