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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,1 A7 `9 f. ^3 h1 ]7 r) B
  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 m& L' h- n3 t. V! B. P2 x9 X
  Loads are processed by each operator for the following time:
  E1 Z% {0 o5 {3 A% T! a  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins., E8 l* e; b3 m
  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.
# z3 R# Q) D4 R  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.6 x0 ?6 e9 A- [6 e7 q6 J$ f5 h9 ^/ S
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.2 H' E; h: [1 B$ S% i8 ~1 Z

& w* G$ p! ?& t% r$ u: g; c6 Q) p问题:
2 @; T+ t; e+ p6 hAfter running the model for 10,000 days, what was the average number of loads in each process?3 a& g0 ?) P2 p' g4 v7 Z# E0 u

' e3 V# b' o" f8 |不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving6 @4 d  c3 E9 D) J  h# u% k9 f; P
move into Q_wait /*Capacity is infinte*/8 O6 ]% F8 X! D0 H; _* P. H# r+ S
move into Q_process /*Single capacity*/
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$ Q; v1 i: C" [# duse R_A for n 60,10 min /*Resource A*/
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% y  X# W) l% m8 ?5 ]. Psend to P_B5 @4 f+ e6 D' v6 W7 Y
end8 g- }0 N1 j2 o% P
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P_B and P_C is similar
2 |; i, @  ^, F5 ?8 f+ w' A, H: w8 j8 Ptriangular 30,60,90 min
$ x* v# T# E, ]4 |6 Eu 60,30 min% |" r* m% Q. T. j* t

# M! D! G7 ^# K1 \: ~( k, u4 i) u' F; m7 \# z
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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9 M% G# @, f, Y# w0 z" R( c  s# w, C4 U8 [; E7 w
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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