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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,  b! t' F! a# g0 [, 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.
) [. Y! E4 c, n  Loads are processed by each operator for the following time:: x1 r. e" _8 Q  s! O
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.6 t2 h3 z! V& r& s) Z
  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.5 @! h: V5 _$ Q4 h( R9 A9 R, T) ~
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
$ M6 ]. W7 O; ~8 ]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.
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问题:
& g* _% j; l9 A7 oAfter running the model for 10,000 days, what was the average number of loads in each process?4 _2 p' k5 l8 h' B5 w* u, G7 w
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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# Y8 }8 Z) d, S/ O( |8 s
move into Q_wait /*Capacity is infinte*/
+ ?' k- x4 A) s  J! p' _move into Q_process /*Single capacity*/' J  E- T' [$ ^$ O
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
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) R7 h# d, c! W8 `% N. L! F/ h6 |P_B and P_C is similar
& C8 ^+ M2 B; c4 I/ L6 Ltriangular 30,60,90 min1 f/ J3 N1 v) [% \: \5 W& w
u 60,30 min
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: d% C# v$ C- I" L5 @/ Fin P_C, you need to send to die.2 t  y8 v1 m7 w$ }0 l! l

; M" b4 ]0 f, w# G1 }  T6 ZThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.2 j8 u  a/ F- I  n' Y6 `/ |) Z" B
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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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