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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,
0 i7 r7 w( q6 D9 f; d) c# }  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.% M8 ^2 D: ?7 N: ^" B" w, y7 N: O  N
  Loads are processed by each operator for the following time:. b: r" W! J$ D, x: z2 g
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
' O8 Q1 A9 P' W7 s* s1 W  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./ X, w1 m5 G  g
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
; f* i" u6 E: ]2 I4 E1 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:
( w9 c; N8 Z# R; F. F! y! iAfter 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! v4 }7 O  V! y9 r3 w$ a" u( r4 j
move into Q_wait /*Capacity is infinte*/3 ~0 l+ Y) j) }/ [- T3 T/ F
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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send to P_B; B+ N8 P* i8 O
end) c0 Y! M5 P/ y& L

7 Z# p0 |& Z: ~1 ?9 p5 A- xP_B and P_C is similar: R" [2 `1 v: Q9 n" }3 ]
triangular 30,60,90 min
1 Z' y; P$ v5 Z' \u 60,30 min
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in P_C, you need to send to die.
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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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