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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 |. W7 f- E5 B" f( Z* 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.
% T" n9 f6 G/ b" p0 U5 X1 }  Loads are processed by each operator for the following time:/ i' F& n& @, Y3 Z! j
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
4 R! r. a1 R2 e! s' w8 [- v4 T5 x  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.
% e3 E! A( J% m5 C/ s  Worker_C does the job in a uniformly distributed time between 30 and 90 mins./ ?, Y- ~5 E; k
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.
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问题:
& H  Q) S( \& G+ WAfter running the model for 10,000 days, what was the average number of loads in each process?1 [" P4 w# B  v6 r% v8 R

. R- G1 y, D" |6 b: L4 u不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
( e+ Y1 h! y, S: ^/ s- o+ K$ Emove into Q_wait /*Capacity is infinte*/
) l9 u& f# B5 R& U( ]4 z. g4 i9 Umove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/3 [0 {, n6 Z# A* X1 W3 u
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send to P_B
$ V% t' ], _5 ~5 Z) {/ H1 Hend
  K/ Y. {% m, \
. q8 E% K* f! U* b. k  ?" aP_B and P_C is similar
: F: p4 ?8 ]3 [triangular 30,60,90 min* c/ M& F& p$ X
u 60,30 min
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in P_C, you need to send to die.2 N7 |& t  o$ \

% J4 ?" S, q& k3 sThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.1 Z/ s$ ^+ e& F6 R# M0 I
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# E& j- n0 w3 c" e4 e* dRemember 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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