Operations Management: Processes And Supply Chains (12th Edition) (what's New In Operations Management)
12th Edition
ISBN: 9780134742205
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter B, Problem 11P
Summary Introduction
Interpretation: The average time spent by the customer in line and get service is to be determined.
Concept Introduction: Waiting line model is used to calculate the performance. The probability in a waiting line requires to wait for service.
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The manager of a branch office of Banco Mexicali observed that during peak hours an average of 20 customers arrives per hour and that there is an average of four customers in the branch office at any time. How long doesthe average customer spend waiting in line and being serviced?
A bank teller takes 24 minutes on average to serve a customer. What would be the hourly servicerate used in the queuing formulas?
An average of 300 customers per hour arrive at a hugebranch of bank 2. It takes an average of 2 minutes to serveeach customer. It costs $10 per hour to keep open a tellerwindow, and the bank estimates that it will lose $50 infuture profits for each hour that a customer waits in line.How many teller windows should bank 2 open?
Chapter B Solutions
Operations Management: Processes And Supply Chains (12th Edition) (what's New In Operations Management)
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- In an M/M/1 queueing system, the arrival rate is 5 customers per hour and the service rate is 7 customers per hour. What is the expected number of customers in the system (L)? (Round your answer to 3 decimal places.) What is the expected waiting time in the system (W)? (Express the waiting time in hours, round your answer to 3 decimal places.) What is the expected number of customers in the queue(Lq)? (Round your answer to 3 decimal places.) What is the expected waiting time in the queue(Wq)? (Express the waiting time in hours, round your answer to 3 decimal places.)arrow_forwardMany of a bank’s customers use its automated banking machine (ABM). During the early eveninghours in the summer months, customers arrive at an ABM at the rate of one every other minute(assume Poisson). Each customer spends an average of 99 seconds completing the transaction.Transaction times are exponentially distributed. Assume that the length of the queue is not aconstraint. Determine the average time customers spend at the machine, including waiting in line and completing transactions. Determine the probability that a customer will not have to wait upon arrival at the ABM. Determine the utilization of the ABM.arrow_forwardExplain how waiting lines can develop even when the service time is a constant.arrow_forward
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