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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,8 }0 G" A2 G5 f: ^; E" e
  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./ g) U* J1 [% Y. o2 \! I$ x
  Loads are processed by each operator for the following time:
+ P$ v5 @! Z5 m- s% H4 e- Z  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins./ d: }  S% H8 s/ D* ~
  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.
+ g1 i! v3 e5 {$ J) ]  v7 o( s  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
# ^  D) n  ]# k( jSend 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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) X7 S8 m' ^% _* K问题:
  b, o4 ?, V+ `. b% A) ]* UAfter running the model for 10,000 days, what was the average number of loads in each process?' }) e' @" {( Y3 p9 H5 m! `5 E
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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
) ^& \% B  a% p) E. ]4 Jmove into Q_wait /*Capacity is infinte*/. E, s$ y6 M0 |& ?
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/! d/ e, j, x6 I+ {  [! M4 z6 Q

: N+ w3 k. _2 ]4 s- N$ |/ {& Esend to P_B
" k# b! U' d0 u: [$ f& {end# ?1 S' J! y* b/ v4 G0 T% V

# g9 U$ x% K1 N7 G4 n- w) YP_B and P_C is similar
, K# Q! _( ?4 Qtriangular 30,60,90 min/ @2 y! O0 i  X8 P% t  K
u 60,30 min/ H' [) \2 Z$ r; `
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/ m7 L8 ^* O, P  q3 W8 pin 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.# M6 v! |9 \# |1 w

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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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