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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,! j6 \# Y% D% B3 x
  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.
5 ~+ K) E  D9 u  Loads are processed by each operator for the following time:+ F* f8 |+ r, N4 f" D
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
+ ?5 A  t& K' _1 A4 |! \/ {  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.
( V; x0 n( O& h4 b) g$ D8 C  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- C1 d& t, x4 I
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.' _  P6 O5 d# j3 j- n  \
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问题:. k, e  f0 Y1 ^6 K# a* Y
After running the model for 10,000 days, what was the average number of loads in each process?7 r4 f- Z2 n; W  r0 s; W: w' s

) h6 J$ C- K. ^, S不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
: W( P7 B! D' ?$ U( b, D: s* m. N' {move into Q_wait /*Capacity is infinte*/
8 t# Z% v4 ~: @% T( E5 }8 _+ d' F4 Ymove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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" R" E0 ~) ^; `& p: k' G/ Ssend to P_B; i) \$ Y$ E7 m  v& \' b2 _/ Q
end3 o6 I- }: _) g- B7 ^
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P_B and P_C is similar+ }( E! c4 w, ~
triangular 30,60,90 min- y0 [/ `3 H1 T( y
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.
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6 w1 I" p* z8 B8 [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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