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Related Flashcards
Cards In This Set
| Front | Back |
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What is arrival rate
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Lambda
average number of customer arrivals per time period |
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What is interarrival time ?
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1/lambda
average time between the arrivals if arrival rate is 6 customers/hr... interarrival time is 1/6 or 10 minutes |
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What is lambda?
what distribution is arrival distribution based on? |
Random and discrete
Poisson distribution |
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What is service rate?
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Mu
average number of customers the server can serve per time period |
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What is service time?
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1/mu
average service time per customer if bank teller can serve 12 customers/hr, what is the average service time? 1/12.. or 5 min |
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What distribution is service distribution based on?
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Exponential distribution
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What is system utilization rate?
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Ro
the proportion of time the server is busy |
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What is Ls?
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Average NUMBER of customers in system
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What is Lq?
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Average NUMBER of customers in line
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What is Ws?
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Average time customers wait in system
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What is Wq?
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Average time customers wait in line
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What is Pn?
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Probability that there are n customers in the system
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What is flexible flow?
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Different types of machines grouped to handle all products/services
low volume, high variety ex: French restaurant.. customized meals |
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What is line flow?
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Machines organized around the product /services
high volume, standardized ex: McDonalds, pumping out same exact cheeseburgers |
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What is corporate strategy?
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Future directions vs. competitive priorities
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