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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,
# K. w+ V; t  G% f  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.9 O/ ^3 C7 g4 ]5 e8 z: L( U' g* j
  Loads are processed by each operator for the following time:1 a! ~& F, D& T: M# R) d% K8 @1 q
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.9 s5 a, {& x* E# o
  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.7 ?/ z4 a, @/ [  B
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
% t5 X) w# ^0 F7 P! M; f& 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.8 A6 F4 x) s+ ?9 n/ h: t
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问题:  f$ J* z4 W0 g/ Y( a
After running the model for 10,000 days, what was the average number of loads in each process?- x1 e- h# d, N2 N" J$ G

7 ?) ?; L1 \8 W6 ~& P/ J% H! }不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving) _* P0 y  B  T: [
move into Q_wait /*Capacity is infinte*/5 o/ ?% M9 Z7 p: u
move into Q_process /*Single capacity*/2 V0 }6 V; @$ U9 f' Z- g6 p
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use R_A for n 60,10 min /*Resource A*/
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) c7 t; E% R4 a5 v! p2 a- Fsend to P_B) I. W! m2 b% `, `! A8 x
end  r2 M/ L6 `6 |! v* G; P

: X2 E+ g0 W( I3 h9 C: @! kP_B and P_C is similar* f3 t0 ~9 H+ a7 l9 T
triangular 30,60,90 min
5 g! l- d. v1 l6 w# i/ @! Q0 t, Au 60,30 min
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in P_C, you need to send to die.( L: K4 K& Q3 U: C
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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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