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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,2 v8 e' i4 S% L' l6 r% A
  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.% F) k" L! k" K5 P( a
  Loads are processed by each operator for the following time:
" T: h# g3 ~" ^! C6 w" Y+ ~( g4 b9 b2 s  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.7 W5 @  |2 x% A6 ^9 L  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.
2 m4 C2 w8 O+ F, Q2 ~; C' h  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
; g# ^+ Z- X& t1 {; M. SSend 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:4 I- D3 G+ o" }! H8 R1 }" f9 A7 B$ G
After 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
& @& S; [1 f9 J* A1 M/ {4 i$ qmove into Q_wait /*Capacity is infinte*/
8 O0 c$ ]4 A% A( c6 E# [move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/) Y+ B: m6 ^( y5 C2 y! X, O

" D. A% N* i- s) Q# Nsend to P_B
" h- p& T0 U8 @" V0 j! ?end
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P_B and P_C is similar, y; l% t) E2 K1 [/ E
triangular 30,60,90 min! j# G) w, f5 T$ @7 N. ~
u 60,30 min
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in P_C, you need to send to die.' Z) W( J7 ~% g6 L9 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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