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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,( H" N$ v+ L6 w( ?/ j4 U
  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.* o% ^$ }( S! c  v& w
  Loads are processed by each operator for the following time:
  \3 s7 i) k$ X( o" h1 j  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
, R1 }5 c2 u1 ~7 ]% [6 ]! A' o5 K  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.: v9 O* n7 e0 O+ @2 O: w9 c  P* N
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) F( s, r" F2 J7 ~9 `Send 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:+ `  m2 p  m+ F9 t
After running the model for 10,000 days, what was the average number of loads in each process?3 R8 x8 Z6 n6 g2 z: i2 q9 e
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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
+ `& \/ K0 M2 c+ F8 E% L6 \$ V0 zmove into Q_wait /*Capacity is infinte*/
2 l1 k5 t- b# n. l! B$ j# ymove into Q_process /*Single capacity*/, [4 }+ T9 {3 ~5 i8 ~7 r5 m0 H
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use R_A for n 60,10 min /*Resource A*/
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' K% [; s6 Y2 t, k& t; p! ~5 `send to P_B
. V5 N" [9 n- r* O- c1 bend
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6 ?6 w' W) |+ k0 J, UP_B and P_C is similar
( T: f7 K* u9 Q( ]8 z# Htriangular 30,60,90 min
" G, I: M, L7 Au 60,30 min
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& A! Q+ B8 ~8 A: }: `; E+ O9 Cin P_C, you need to send to die.
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7 S: d' B4 s) b1 c+ kThen 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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