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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,0 O& @0 F: H% f" s3 q
  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.* |% Q  W6 p/ J0 m" I
  Loads are processed by each operator for the following time:! [* [1 |9 _" s2 S% J! F
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
# f6 Q. u, V2 ]) B. s4 u/ i  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.% t  L2 @1 [# q2 t. D3 D3 ]% m
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
. z; {$ t1 A$ }( y( P( H: M* nSend 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.& R, e" d& C" u4 V
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问题:
* W/ Y, u6 {5 G$ C" S+ `; t' lAfter 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 arriving8 S  Q: A# h0 E& p$ v* w8 C& Z
move into Q_wait /*Capacity is infinte*/
4 d8 T; \4 L  S; U; Vmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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) _( z4 I0 d/ t% R# xsend to P_B' T& A' I& ^1 ~0 i
end, E5 Z. j4 C( A+ e/ X4 F
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P_B and P_C is similar# _! _7 n( e# j( h( S* c
triangular 30,60,90 min
' @; M# f9 Q# J% {u 60,30 min
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in P_C, you need to send to die.
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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.5 q" G+ e% b* ^+ s. f7 o

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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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