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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,
; L" @3 T0 b. C( r) F1 ~: 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.
( s$ F8 y6 h( W2 P, ]4 ]$ n  Loads are processed by each operator for the following time:
) o- B3 E8 z! q5 K, @) r: }  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.- `/ |- q4 o2 T+ E% 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.
5 _5 U& S% S, ^# F7 |7 l, P  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
  R' j) Q, ]4 B% Q1 }& cSend 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:
/ {& u7 ]+ z9 T0 M, UAfter 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
' k  a. }) |( I" m0 xmove into Q_wait /*Capacity is infinte*/; {  X* K/ F9 d8 ~; L
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/9 P0 Z$ Y; s6 U
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send to P_B" C2 i+ h/ @, s- z/ G# c1 I6 [+ x
end% p) s% `  ]  k; Y: ~# r
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P_B and P_C is similar
, a9 }1 C/ v0 L& D. a2 I) e! htriangular 30,60,90 min* ]5 ^& }6 |  H, ?3 d' |6 i
u 60,30 min1 g; R9 ~  e+ C/ }# f; x5 m+ z
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in P_C, you need to send to die.
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. T) e# H1 b  P2 i( r2 \Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.) F: U$ I+ |* }2 g4 V) ^
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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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