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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,5 F' r) s; @( }6 _, u! m
  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." A- F$ I- m5 H! q3 X
  Loads are processed by each operator for the following time:/ t; R! r; T2 J
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
, W  r6 Z, O5 Z: c9 I& i( `  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.
, @) T! o. q, F  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.  D2 l$ |) r) b! Z" k; [6 a
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.( V' D% a, G9 S* J. r: Q

0 F0 R1 q; Y9 X/ L1 Y- l问题:
. |" J+ x) [# O! W9 P7 Y+ `% f$ EAfter running the model for 10,000 days, what was the average number of loads in each process?
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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
! K4 ~! F; y' r  k5 Q5 r' D; K; Xmove into Q_wait /*Capacity is infinte*// q2 }9 V, \" G* [2 B$ t: n
move into Q_process /*Single capacity*/6 a0 C7 b# I: ~3 H7 C

! y+ y+ z) f$ ]! [6 R) Duse R_A for n 60,10 min /*Resource A*/
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( H# c, Q! e' v8 Y5 csend to P_B8 [8 W* T5 I! U& g  d9 r/ K
end
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P_B and P_C is similar9 M( Z; [# D% _% @5 e4 _' R# S& T' Q
triangular 30,60,90 min; r  U; q( q$ k5 W
u 60,30 min
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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.* ^6 S# z* d! L5 F
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; a6 ]9 u3 P# q9 c: L/ \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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