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14 Cards in this Set
- Front
- Back
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L |
Average number of items in the system |
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W |
average throughput time |
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Lq |
Average queue lenght |
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Wq |
Average waiting time |
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L |
L = lambda * W |
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W |
W = Wq + E(B) |
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Lq |
Lq = lambda * Wq |
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Number of customers in the system |
a |
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Verification of simulation computer programs |
- Conversation with specialist - observation of the system - existing theory - relevant results from similar studies - experience
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Uniform distribution stuff |
f(x) = 1 / (b-a)
F(X) = (x-a)/(b-a)
E(x) = (a+b)/2
Var(x) = (b-a)^2/12 |
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Exponential distribution stuff |
f(x) = (1/beta) * e^(-x/beta)
F(x) = 1 - e^(-x/beta)
E(x) = beta
Var(x) = beta^2
beta = 1 / lambda
lambda = 1 / mean |
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Geometric |
p(k) = p(1-p)^k |
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Binomial |
p(k) = (n,k) . p^k . (1-p) |
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Blocking probability |
blocking probability = (lambda*beta) / (1 + lambda*beta) |
