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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,) v, g6 y( y& Y/ @0 C) `7 P
  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.
! ]% g. z5 W+ t9 U' z* v" O  Loads are processed by each operator for the following time:. p, j1 a+ c2 C9 |
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  O2 p7 Q6 Z4 W. e8 t  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.
  m% i" V" g0 S2 A$ I  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
* N6 c3 s1 Y5 @& y6 uSend 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.$ N- s+ |) \( x6 u; G, Z
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问题:% W3 N% Y1 J, L! h
After running the model for 10,000 days, what was the average number of loads in each process?- Q5 h  v' I  E) j7 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
9 U+ d+ z& S* H( y. Kmove into Q_wait /*Capacity is infinte*/
/ L, U: P) D% ^  lmove into Q_process /*Single capacity*/, A5 Q2 |. A! M0 s; F

6 f: x# p- w7 \2 \& ?; ]use R_A for n 60,10 min /*Resource A*/; S7 A" t$ ~# v

( V; u6 ]- e1 o4 q0 Z7 _9 Gsend to P_B& a. v. ~, n6 a  L: t5 _* Q
end7 e! a1 M0 w) Y1 p

& Q! ^$ b6 U2 T6 y7 R4 V5 dP_B and P_C is similar
. C/ J* n9 r4 @- J2 P4 ctriangular 30,60,90 min
) h* M/ `5 h/ O6 U& P) K* i5 B5 G( qu 60,30 min
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in P_C, you need to send to die.5 F+ U: a. E0 j% i7 P& o
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Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.# _+ Y( j" f/ X7 ]: [; @
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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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