3325p11hs d waiting line

44 limited population model notations d probability

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Unformatted text preview: Service Average number waiting: L = N(1 - F) Average (1 Average number being serviced: H = FNX Average FNX T(1 - F) (1 Average waiting time: W = Average XF Number of population: N = J + L + H Number D – 44 Limited-Population Model Notations D = Probability that a unit will have to wait in queue N = Number of potential customers F = Efficiency factor T = Average service time H = Average number of units being served U = Average time between unit service requirements J = Average number of units not in queue or in service bay W = Average time a unit waits in line L = Average number of units waiting for service X = Service factor M = Number of service channels D – 45 Finite Queuing Table X .012 .025 .050 .060 .070 .080 .090 .100 M 1 1 1 2 1 2 1 2 1 2 1 2 1 D .048 .100 .198 .020 .237 .027 .275 .035 .313 .044 .350 .054 .386 F .999 .997 .989 .999 .983 .999 .977 .998 .969 .998 .960 .997 .950 D – 46 Limited-Population Example Each of 5 printers requires repair after 20 hours (U) of use One technician can se...
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