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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,5 d8 [7 j9 m/ u% C
  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.* y0 M/ A6 I5 y0 A
  Loads are processed by each operator for the following time:2 S' j3 {+ x# r4 i
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
4 Z& P0 K& _  M6 U) q& L* I% H, M% E  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.
: S1 g6 F+ L, v1 x  {4 f0 J0 @  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
% d2 p, T/ ^- W2 F6 ^( Q: |$ sSend 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.
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问题:8 q# x+ w6 ~1 ]) f8 O
After running the model for 10,000 days, what was the average number of loads in each process?4 h  k: `( R) P. G( u; [) ?; [
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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
! C; S1 \* N# v, p3 H) h+ p" e; Jmove into Q_wait /*Capacity is infinte*/
1 |6 S; Q. r2 q! J; U* Y8 Umove into Q_process /*Single capacity*/. }6 n* U8 L1 W* z
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use R_A for n 60,10 min /*Resource A*/
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send to P_B" K$ L4 o* o' \3 Z
end! Q; A; I' E7 N; ?" a- |  W2 D1 E( U

* q" n% T! ^5 X! N2 r) cP_B and P_C is similar' I+ ?" _  W7 Q1 s+ V+ I
triangular 30,60,90 min
2 a; g0 v1 H& e* @u 60,30 min+ `0 e* ]: m# q3 X- E3 l4 H1 t

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& k! I) r$ O4 N: nin P_C, you need to send to die.
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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.
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% @% {; _+ a# G- eRemember 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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