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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,
+ ~& S2 p9 Y% F, O5 z2 q  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.
- C2 }/ k' Y  e$ w, h1 A  Loads are processed by each operator for the following time:
! Q( T) p% [. T  n! \% _& _  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.  Q( U3 ~6 h& p" `& W
  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.
: G! X# L. p( h! q/ ^& x  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
9 H5 e5 u' Q( xSend 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:
/ q" b- k+ K9 d% [4 ?! iAfter running the model for 10,000 days, what was the average number of loads in each process?3 E$ v! i# d* q0 X+ \$ v# w7 k3 L

* q' @9 [3 h* p! t* U2 R$ q不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
2 x) W* @2 z5 q8 X0 r/ V- f) x/ Cmove into Q_wait /*Capacity is infinte*/! y+ D( C- ~) }. J% g% ?, {
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/; y) K( Q, z7 S

2 s. Z. G1 p( r9 E$ Jsend to P_B
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$ X  }5 s/ Y# _0 z8 J3 x& oP_B and P_C is similar  s( l/ a. G4 a
triangular 30,60,90 min
# s3 |' l! B0 s5 R/ Au 60,30 min1 F2 L( y2 v9 F$ T0 c
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in P_C, you need to send to die.  T" o7 z% w) S% a, g, D' S

% `, ?& L# y$ zThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.( ^$ m- P, Z/ j# h: ^1 @
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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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