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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 W) B5 i* \  f  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.  r( J4 p: d6 G; n$ T+ r
  Loads are processed by each operator for the following time:
7 W* H# }  k1 m& N  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins., B* |% D- V, @
  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.' r- h$ c) ]1 n  Z3 t2 ?
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins./ v- i9 a$ x" F7 q
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.' `9 J' B% j3 @6 z* P* M: ]. Y

$ e, R1 E# P- ~, |问题:$ Q' R1 s2 t! W' [" _1 N0 F8 d# X  z
After running the model for 10,000 days, what was the average number of loads in each process?& ^8 P; j  a! h* z* ^: Q2 s: q9 ?

& o1 k; O3 N( x" }, g0 {% z, R; E不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
4 e; N- Q2 H/ m2 c6 `8 ymove into Q_wait /*Capacity is infinte*/8 T$ Y* f: z9 v6 B* a5 d# O
move into Q_process /*Single capacity*/& G0 q9 V/ Q/ g0 G" `
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
4 }( Y- X; r  Bend
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  h+ X) S$ t! e; l) nP_B and P_C is similar8 t$ P  {0 S" Z3 V
triangular 30,60,90 min1 y% L$ [7 h$ r% O. `, z5 T( u. |
u 60,30 min' n& k( a. {6 F) I; x
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in P_C, you need to send to die.& T( r$ M5 s# n  `

1 f$ D# c  R$ G9 O7 }; ZThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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( u% J4 G; C& `5 }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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