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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. Y, L+ _5 |0 P
  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.6 O! ]" s! d7 G5 D# F5 D- p3 R
  Loads are processed by each operator for the following time:1 x5 ^6 b; q+ O7 o; p2 a
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
' Q. T. q6 Q5 j! K' p  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.
$ g6 q7 F, G( D, `  w( p  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.5 Q& H9 ^" H$ E( R6 L2 t0 [
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.! U! Q' ]' M6 K0 K6 s
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问题:+ M1 d* i2 D" E% v7 C& y
After running the model for 10,000 days, what was the average number of loads in each process?& ?# F3 t; |5 K. R  {( j; ]

6 b) o7 {( _& K% u不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving0 c2 A: W" n) A1 _! Q" s' Y6 C6 a
move into Q_wait /*Capacity is infinte*/
: h8 T; K2 T- u+ w! h' P" Amove into Q_process /*Single capacity*/$ t2 j. Y0 j! ?  j1 A

' X8 m* @2 A# a0 }+ ]* \use R_A for n 60,10 min /*Resource A*/7 C& G. s1 _2 x% L
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send to P_B: E! a( M& z, F
end
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P_B and P_C is similar
( i0 z& z0 r6 }( n1 n; F( V2 V5 Qtriangular 30,60,90 min
/ @% B, L# k/ L* U# J1 e# Tu 60,30 min* t+ ^7 U6 U7 i) }2 J& ]2 v
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in P_C, you need to send to die.7 u3 x! Y& k0 Y7 m6 _
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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.& x& Y0 i3 z. `. b4 y" g
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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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