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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,% d+ A; g! Y5 V* ~( Q4 S
  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 ~9 k2 q: }9 m
  Loads are processed by each operator for the following time:
4 q( Q5 @2 ^+ E& c4 P& m* Q  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.& I2 M  ~3 B! G& S
  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.
* }; y( O2 [2 x8 ?4 q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, h( j7 i3 \/ h) O; D0 |+ iSend 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.5 R; b3 L% b2 x+ D% Z, y

8 P" B: C- C1 z" g% K& p4 s问题:
" S; j; i" y) k# TAfter running the model for 10,000 days, what was the average number of loads in each process?
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5 a2 y. |- K2 i7 u不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving$ E3 k; X9 o! C
move into Q_wait /*Capacity is infinte*/
8 d* @" v" b& A. b9 w+ Fmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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0 x2 j* x7 m3 ]2 h- W( ], q. qsend to P_B7 l, I: t4 r( `* l  w7 `
end
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P_B and P_C is similar6 n( L! w" I% K3 |: x2 ]1 ~
triangular 30,60,90 min1 Y, L: b5 D/ e! v
u 60,30 min: @& ~" |- F  E
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in P_C, you need to send to die.: R/ B5 ~# e0 x% I
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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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9 z( R$ [* v" O* _1 E1 N  n1 m' ZRemember 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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