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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* r6 g! M' v: c/ X
  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.
& \: v/ Z6 w- M% i9 ?/ {  Loads are processed by each operator for the following time:6 }' N1 \; m! R, j
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
2 M+ f( P4 o9 d* {! d) H! V! {& i& e  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.
  n1 ]& w9 c' U% ?  G+ [8 L  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
5 C9 o9 D6 a) T: t5 D  pSend 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:
" D$ l3 W5 ~) C4 H; Y6 d! \After 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  @# I* x/ Z6 l7 E5 e
move into Q_wait /*Capacity is infinte*// w: h; k5 w* T. l; ^1 y
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/7 Y1 a! E! m/ ^) u5 v8 C

9 e+ R' v  g0 C8 Hsend to P_B" ?+ Q/ k) q! D5 U7 ]# X0 g# O* @! l$ k
end% C/ K1 t# H" q7 F
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P_B and P_C is similar
0 u& h$ t8 K( K4 ftriangular 30,60,90 min
: E( M1 w! ?0 k1 s! s1 d' ou 60,30 min
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in P_C, you need to send to die.1 G& T2 `/ w# m% [* j
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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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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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