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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,9 b+ h' [/ m% p1 g6 ?. G: n
  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.
6 a1 c( }' W; l1 w1 ^5 \  Loads are processed by each operator for the following time:
) {9 [) h( n: l( r- h9 k) I3 Q  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
: [0 F" J! ?" Z1 L9 w3 P  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.
! N, f3 x7 a" G" R& I' Y  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.% x5 x' \+ r3 ^, p9 \" b8 x
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.: w; v) b6 o. J. T8 u5 ?0 ]' q

+ j7 ]& i0 m2 L' \" ]% d问题:; B0 B) @$ z$ d; \  I# F6 Q
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
3 O3 M* R- K: amove into Q_wait /*Capacity is infinte*/
3 P* ?' W5 E/ O; r, Q  Qmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/6 h/ s# U+ m7 ~, I4 t+ h
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send to P_B& h7 i. H  I) L# P3 g3 x4 j  @
end2 I9 e' y5 |0 P  }( Y; n
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P_B and P_C is similar% ]% T: `" H  j& Y. ~& Q1 i
triangular 30,60,90 min
0 h' N$ n4 u; r# k# f5 U% qu 60,30 min
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in P_C, you need to send to die.9 h- L/ J. M) C+ b/ z6 w: f/ o& h

2 m0 t5 A! n  n4 g& cThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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- C6 P5 L5 e% J; |. q; ^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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