3325p11hs d waiting line

Average time that each customer or object spends in

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Unformatted text preview: ) Time D – 16 Measuring Queue Performance 1. Average time that each customer or object spends in the queue 2. Average queue length 3. Average time each customer spends in the system 4. Average number of customers in the system 5. Probability that the service facility will be idle 6. Utilization factor for the system 7. Probability of a specific number of customers in the system D – 17 Queuing Costs Cost Minimum Total cost Total expected cost Cost of providing service Cost of waiting time Low level of service Optimal service level High level of service D – 18 Queuing Models The four queuing models here all assume: Poisson distribution arrivals FIFO discipline A single-service phase D – 19 Queuing Models Model Name Example A Single-channel Single-channel system (M/M/1) Information counter at department store Number of Channels Number of Phases Arrival Rate Pattern Service Time Pattern Single Single Poisson Exponential Population Queue Size Discipline Unlimited FIFO D – 20 Queuing Models Model Name B Multichannel Multichannel (M/M/S) Number Number of Channels Number of Phases MultiSingle channel channel Example Airline ticket Airline counter Arrival Rate Pattern Service Time Pattern Poisson Exponential Population Queue Size Discipline Unlimited FIFO D – 21 Queuing Models Model Name C ConstantConstantservice (M/D/1) Example Automated car wash Number of Channels Number of Phases Arrival Rate Pattern Service Time Pattern Single Single Poisson Constant Popu...
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This document was uploaded on 02/19/2014.

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