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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,
/ w% o- q& U# a8 V5 C% v- N  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.9 X0 N1 R4 ^1 h3 Q
  Loads are processed by each operator for the following time:- z2 \  w- S; E9 H9 |
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.' r9 d; s# V  J- L2 K% f
  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.
' U5 v6 }% J. @  k2 g0 w& B  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- h/ N. a( t) 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* S! Z" Q/ F/ J- u8 @
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问题:
. K0 m7 y3 J' h( m3 s0 `After running the model for 10,000 days, what was the average number of loads in each process?" B4 Q9 y2 c' U
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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
1 Z0 [4 L3 L3 W& I& Imove into Q_wait /*Capacity is infinte*/5 ]0 N( J# b/ c: O  ~' Q
move into Q_process /*Single capacity*/
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) b; z& |/ {9 O* i. U+ w4 xuse R_A for n 60,10 min /*Resource A*/
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8 v. A, y# |7 ]! t) }send to P_B* L) C. |8 \& Z7 y' o. p
end
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P_B and P_C is similar% _* f+ @% D+ l& @  \
triangular 30,60,90 min; }% v+ g% N" A8 W
u 60,30 min& k  \1 V! j/ P1 d0 G5 m( g5 L
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in P_C, you need to send to die.2 P: q2 V/ U, F9 h; b, b# K0 @
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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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$ b3 N) i* Q5 g7 _( NRemember 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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