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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,
' G4 q2 T/ T& S0 B  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.
- ?6 V& G2 E6 w8 r  Loads are processed by each operator for the following time:
/ T3 `& a9 b8 ?1 J  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
! [2 N+ \. 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.
, f$ t6 U. J4 U7 h4 S( J' u  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
/ ^1 x# L: A' T, O2 ^* |5 I* c8 xSend 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:( l& r1 z& l2 {8 H1 Y
After running the model for 10,000 days, what was the average number of loads in each process?$ b9 h9 G, k( |4 b
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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
1 q% _7 M, L4 N3 Lmove into Q_wait /*Capacity is infinte*/+ g6 g, ]6 _) B, `( i6 O! M6 ^
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/5 @) W# g4 ?  ~7 }1 p3 Z
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send to P_B
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P_B and P_C is similar
7 p; o* S' ^5 w1 ntriangular 30,60,90 min
5 ]) Q  T. w+ H! u. W' mu 60,30 min/ P& D+ ~( [' D" W( I: j* @& P& ^
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in P_C, you need to send to die.7 u. ]% c- f* {- F

1 _. I3 u% D2 Z' K$ F; |Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.9 X4 S  \( N; \% b+ v5 W; H, X6 r2 d

5 E+ a3 w2 Y2 S$ q- e' g2 O' c* ~0 o* F4 Y6 ^+ }
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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