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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,  T* Q4 J' W  J" N0 r
  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.2 M& M' V/ P, ^
  Loads are processed by each operator for the following time:9 @5 V9 R+ ]1 E0 ~- R' c0 D
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.. ?; Q7 [( L! X" [* x2 O
  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.7 h+ @, k- f$ m5 g2 z5 @0 f
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.( K; c3 B$ P6 c) S  a% x
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:
, q9 ~; @* K6 V8 B* jAfter running the model for 10,000 days, what was the average number of loads in each process?$ y1 V5 _' k4 ^& V/ b! U

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发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving- e; m+ X+ m2 B  M
move into Q_wait /*Capacity is infinte*/( c- o1 n" Y0 u' @5 D& }
move into Q_process /*Single capacity*/& e  N6 N2 _- P: ~  h( D, X

1 I) i  O7 t* |1 L) @use R_A for n 60,10 min /*Resource A*/) S  M7 [6 }9 R% U+ v

$ y% y) W9 ~9 _send to P_B- B2 U) C! D. I2 m
end% s5 I# r4 Q) X* u
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P_B and P_C is similar
4 R. \, ?, v( \2 Y& b8 ktriangular 30,60,90 min
. B& e* Y- L1 G- |u 60,30 min8 F0 L6 R, W$ Y9 I9 n

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in P_C, you need to send to die.$ T  ]  Y2 d- e/ I* S& j, d

) M! I: }2 V* X/ S0 ?6 H/ [Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.6 s3 B! @" j- G+ U
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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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