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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,# L- f: o' D  ~& U
  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.* H. [8 K, S1 ~% y( K# i
  Loads are processed by each operator for the following time:
. Z1 }$ q1 _# }! b* d8 T$ q  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.& [0 z& s. q8 E( ~  b6 u
  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.
3 K) N3 q/ Y1 V) f  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) m' `9 L$ U/ L' c1 C: H2 f. ESend 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.8 ]% o$ c9 s9 Y) R) ?1 G, X
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问题:
9 [5 \8 i1 ?  |8 I5 m+ OAfter running the model for 10,000 days, what was the average number of loads in each process?$ u0 p+ l% r1 s# F, `) F! O- C) |# U0 x

0 o7 k' z8 `" Y不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
6 C; A( G0 q- g! Pmove into Q_wait /*Capacity is infinte*/; n3 Z7 `1 N/ N) [
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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7 N; l- B7 Y9 }  N6 h" r2 B5 qsend to P_B
- `3 G! R4 J0 z* R. q. z- }end
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P_B and P_C is similar8 ]( A1 x% m! @# H$ d; A7 C
triangular 30,60,90 min! m8 {* y: o# }. s8 o& c4 F0 G
u 60,30 min7 H2 ~0 S) U5 E

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in P_C, you need to send to die.$ y2 [  R6 Q! S( m  {3 |0 c7 [% l
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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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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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