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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,4 n# [6 I0 p+ V! j7 u# B0 a
  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.
! i* D  {) E. f3 Q4 V  Loads are processed by each operator for the following time:2 k# P- p) C3 O/ N4 E8 k
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.4 D6 k: y2 N% \! V/ _* j" 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.. [8 [; J6 [$ h/ l/ K
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
. k, J1 o/ R6 J" _# H+ uSend 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.# ~7 n6 Z; X, }' [

. h3 L% o5 M" i+ j$ s" J/ N4 H问题:
) V  ?( K" j: E, E+ w; K- |' tAfter 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
; f, l. D! i) c4 _: x0 ]% `) E* ^move into Q_wait /*Capacity is infinte*/
" h' m( p, L6 L$ amove into Q_process /*Single capacity*/+ o0 {  [! _# V- n6 M6 F
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use R_A for n 60,10 min /*Resource A*// [- C, B" V5 K$ I* U5 H
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send to P_B1 O$ L) K1 J  z9 k9 ?* i
end, ?4 o+ |+ B% b& \2 \
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P_B and P_C is similar
  \; |$ R' c% s3 H+ [8 U9 c  ltriangular 30,60,90 min/ E+ L. `( K9 W6 Y1 ~1 {" f5 A
u 60,30 min
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* O8 L6 d$ d2 r# bin P_C, you need to send to die.3 Y* C! ?9 y6 |+ p4 `+ W- H" 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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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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