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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 |- N5 n: T. w9 m0 v' r; A
  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 S: L% A! R  x. b8 n8 T2 K
  Loads are processed by each operator for the following time:7 A; _) \9 v; @& i! _% e
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.+ R, r( x6 ~' I" n9 X/ N% I6 T+ w( g
  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  e% F0 c9 |5 `
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
9 Q. V7 @- T; V/ ^4 J' U5 @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.; c4 p8 o5 I9 n

( _% Y" h) B; M# \) `% K问题:8 j. g1 G9 T) v' q1 l
After running the model for 10,000 days, what was the average number of loads in each process?9 F0 E: m! G0 o' s% B- g7 g- v
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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 arriving4 ]/ v; k" Q9 ]" ?' e3 o
move into Q_wait /*Capacity is infinte*// I3 T; E1 p% U9 z. ^
move into Q_process /*Single capacity*/, V  K6 P  v6 t, s# ?
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use R_A for n 60,10 min /*Resource A*/
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send to P_B4 X: e  o! F, o2 A* }& N5 O% ~) `! x
end" v! b- K1 M4 @' K3 `7 Q
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P_B and P_C is similar
7 X6 w& x  S7 Ktriangular 30,60,90 min8 G0 R  F+ s0 p! ?) [
u 60,30 min+ A# r9 c7 K, P1 G

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# }' X5 v8 A3 U5 e( l- u. vin P_C, you need to send to die./ y$ a$ I7 Z4 V0 f% o
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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.- f0 k5 W5 C  G' w" M# w. y2 p

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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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