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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,& e( w7 o8 a& b$ D. c
  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.
4 Q" y# @9 z5 E9 K  Loads are processed by each operator for the following time:/ Q. F' n& T5 M1 i6 \
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
8 \! ]! G8 [6 C& w1 a  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.
) b, y  ~! _7 d  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.2 a: n' T5 A4 d
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:
! p1 d' w" v6 N% r; G4 tAfter running the model for 10,000 days, what was the average number of loads in each process?& L# x& Y3 D! |0 P

, F" _2 u# @, U- L: |" B0 e不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving& [' @; V# d' }* D9 K; E
move into Q_wait /*Capacity is infinte*/1 r6 _4 T! ]) ^" n3 H+ x
move into Q_process /*Single capacity*/
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. W% Z- I; s# y: A8 @1 c6 P" E0 guse R_A for n 60,10 min /*Resource A*/# f* g8 x  M* F* O/ c, I7 {# V

% ?" N7 X8 W5 x$ `& [& m% Hsend to P_B
" A! x# l% c0 _2 J/ F8 N% X. H8 Pend' z  g* _- d2 x

" @5 _& l" V! @' \) XP_B and P_C is similar+ w( q* m/ q, l1 V3 l% i
triangular 30,60,90 min
/ v/ H# U( V& U7 r# q3 }- A' f6 uu 60,30 min
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in P_C, you need to send to die.. q5 |8 U3 j# e! v5 v$ u/ p1 ~
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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.# j$ E8 t2 J: }# L/ }: g

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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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