Chapter 13 Recitation

# Chapter 13 Recitation - Chapter 13 Recitation 11 Use the...

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Chapter 13 Recitation 11. Use the M/M/s template in Q.xlsx with: Arrival Rate = 30 per hour, Service Rate = 20 per hour a. Service rate = 1/3 per minute b. Arrival rate = 1/2 per minute c. The queue would become infinite. d. Three servers are required to keep the waiting time for check out less than one minute. 13. Use the M/M/s template in Q.xlsx with: Arrival Rate = 60, Service Rate = 24, Number of Servers = 3. Note : We assume customers wait in a single queue for the next available teller. a. 0.0585 hours or 3.51 minutes b. w-w q = 0.1002-0.0585=0.0417 hours or 2.502 minutes c. If Servers = 4, average waiting time in queue drops to 0.0089 hours or approximately 32 seconds. d. None. w-w q = 0.0506-0.0089=0.0417 hours or 2.502 minutes. 14. Use the M/M/s template in Q.xlsx with: Arrival Rate = 5 per hour, Service Rate = 60/8 = 7.5 per hour, Number of Servers = 1. a. 0.3333 b. 0.2667 hours or 16 minutes c. 2 d. \$9*2*8 = \$144 per day e. Probably. The total labor cost of people using the machines would drop to \$9*0.75*8 = \$54.

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## This note was uploaded on 04/19/2011 for the course CBA 0060 taught by Professor Barrymitnick during the Spring '09 term at Pittsburgh.

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Chapter 13 Recitation - Chapter 13 Recitation 11 Use the...

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