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[求助] 本人初学auto mod,有一道题目希望大家赐教

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发表于 2009-10-3 15:08:34 | 显示全部楼层 |阅读模式
刚刚开始学auto mod,这道题目搞不明白,希望大家看看 题目是这样的,& x1 g& l- D$ f6 e2 i" j1 t9 C1 ]
  Create a new model containing three independent processes, each with one operator. In each process, loads first move into an infinite capacity waiting queue, then into a single-capacity processing queue.; j9 V# e' \* d
  Loads are processed by each operator for the following time:
' p0 r; S4 J# R. W  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  \  ^7 Y2 f! H  Worker_B does the job according to a triangular distribution with a min of 30 mins, most likely value of 60 mins, and a max of 90 mins.8 p; S: r! d" |
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.7 v* R+ `" G" U
Send loads to each pocess at the same rate (an exponentially distributed inter-arrival time with a mean of 68 mins) to understand the difference in the processing times of the three workers.% O# I3 u' ^9 u( o/ b) Y" b' _: `

  n' L, H3 q/ ^3 l& v( S问题:2 D; i; l% f3 ^6 h
After running the model for 10,000 days, what was the average number of loads in each process?* F* ^- p% b" g+ H! H, Y, Z) H
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不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving  X+ N6 g/ E1 T4 C" d  \& e
move into Q_wait /*Capacity is infinte*/
! K2 l. u- |, |* K9 p, \. G$ ^move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/& |4 @% x, s9 U. g/ S

0 g5 `* q0 s+ {1 Esend to P_B
6 l1 c: }! c& }3 eend
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P_B and P_C is similar
4 _, x. s! ^& Q& L1 Vtriangular 30,60,90 min" j: _5 a  b% v8 x3 g- y
u 60,30 min
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5 R+ Y) O0 m9 Z7 ^7 i, ~( h# {, i$ S7 Lin P_C, you need to send to die.
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  Z/ z* i- E8 F/ s1 N! YThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.2 ?7 d3 F- A8 v# Z

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Remember to turn off the animation before you run your model.

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 楼主| 发表于 2009-10-27 23:53:02 | 显示全部楼层
thanks...
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