Chapter 2: Q13-11PE (page 344)
A chart that depicts the manufacturer’s and consumer’s risks associated with a sampling plan.
An operational characteristic (OC) curve is a graph that shows the chance of acceptance as well as the percentage of faulty goods (or lots).
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A toll tunnel has decided to experiment with the use of a debit card for the collection of tolls. Initially, only one lane will be used. Cars are estimated to arrive at this experimental lane at the rate of 750 per hour. It will take exactly four seconds to verify the debit card.
b.How many cars would you expect to see in the system?
Question: The exponential distribution is often used to model what in a queuing system?
As the degree of customer contact increases in a service operation, what generally happens to the efficiency of the operation?
Benny the Barber owns a one-chair shop. At Barber College, they told Benny that his customers would exhibit a Poisson arrival distribution and that he would provide an exponential service distribution. His market survey data indicate that customers arrive at the rate of two per hour. It will take Benny an average of 20 minutes to give a haircut. Based on these figures, find the following:
b. The average time a customer waits.
A graphics reproduction firm has four automatic equipment units but occasionally becomes inoperative because of the need for supplies, maintenance, or repair. Each Unit requires service roughly twice each hour, or, more precisely, each Unit of equipment runs an average of 30 minutes before needing service. Service times vary widely, ranging from a simple service (such as pressing a restart switch or repositioning paper) to more detailed equipment disassembly. The average service time, however, is minutes. Equipment downtime results in a loss of \(20 per hour. The one equipment attendant is Paid \)6 per hour.
Using finite queuing analysis, answer the following questions:
B. What is the average number of units still in operation?
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