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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,/ Z) [* f  ^3 M. i" t
  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.
8 t6 j4 N1 j/ v, R7 G( d  Loads are processed by each operator for the following time:
2 j( F, |5 \: T  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.) x- f. f- T  ?9 {
  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.
! K% q. }. v% s1 ^6 y3 w% h4 d/ _  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.9 Z0 R+ w. l. j3 W; t2 T* j1 a
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.* n8 F  t* Z: l
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问题:
' a* h+ B: C8 ~' Q8 k- O9 rAfter running the model for 10,000 days, what was the average number of loads in each process?
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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( \. l6 [5 I4 X/ L
move into Q_wait /*Capacity is infinte*/
/ v# ^7 h" M# C# \- ?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 G/ q4 B$ [. N: p  Psend to P_B
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P_B and P_C is similar) c4 s3 e6 x2 G4 l5 J
triangular 30,60,90 min( x4 ]3 Y6 S0 y6 p) Q
u 60,30 min
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% b9 E8 u8 n) O" oin 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.* L; e0 l* b' A8 M& @- k1 A

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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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