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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,8 L. Q& T/ \' J  n, Z
  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.
- a& Z9 U* r0 K" k9 J$ F0 R) I  Loads are processed by each operator for the following time:/ B6 d- p8 t. o/ j$ R* ]
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.! V3 R( @; A& q2 l; f0 U( ?
  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.
, H6 x5 d0 a9 X/ ]$ Z& C6 q$ e  Worker_C does the job in a uniformly distributed time between 30 and 90 mins." |. p" U. y5 g  W# U; M+ t
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.0 P& q1 O/ x$ q3 c3 X' `2 `9 U/ f
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问题:
: E; ~4 C8 |; P# {After running the model for 10,000 days, what was the average number of loads in each process?- o; b2 U* _: {6 p, T1 Y

7 y9 L; k# D+ P; z# R5 O- ~! Z不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
! L- X0 A6 V& Pmove into Q_wait /*Capacity is infinte*/. X( f0 L* [9 }3 ?# M, Y$ J
move into Q_process /*Single capacity*/
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, k' ?7 G2 B8 G  d; n; K6 vuse R_A for n 60,10 min /*Resource A*/1 R8 s, {9 I, b- j+ ~
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send to P_B
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P_B and P_C is similar% c2 ^; m7 o" r" c
triangular 30,60,90 min8 n; J% p* c6 B: ~# ]: [% l
u 60,30 min
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in P_C, you need to send to die.: a* f  y& o: p* \5 s+ x2 f7 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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, ]. K) W+ p. Z4 `2 cRemember 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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