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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,
, a- B) |; v" F& E  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.
# @8 D4 C" P5 g+ g% Z6 h  Loads are processed by each operator for the following time:- A7 L0 j/ Y: B0 P; e! G' T6 }
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.5 n0 ]; ?$ \9 X" z1 l8 C
  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.
: ?6 T6 a* l: Q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.% V/ d: z+ p- x' R6 w6 p
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.; Q, J- Z0 [* H0 T8 {, L" r
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问题:
9 }# N. t5 Z* ^& n$ E) A( EAfter running the model for 10,000 days, what was the average number of loads in each process?' q0 v# J* i' b) j0 {$ V

6 Q+ `+ j) z$ q- p' b不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving5 _, z# V4 W5 C
move into Q_wait /*Capacity is infinte*/. [4 C% L. x9 [0 C1 m5 [
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/6 b# g' [1 t2 B0 A1 D

" C; o; |+ i& X2 A0 psend to P_B
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P_B and P_C is similar
% l' t1 a% v. \2 P+ Y8 ltriangular 30,60,90 min
3 {1 G1 G% L/ Qu 60,30 min
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- Z, Z7 @+ g% Tin P_C, you need to send to die.
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0 }1 l6 o2 ~- j5 T, A) UThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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. _0 g1 `0 m' [; nRemember 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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