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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,  {- X% I0 A* C) |! P5 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.
. `# c9 ]6 d- j) A: O1 h6 E) `  Loads are processed by each operator for the following time:/ ]1 q* c4 l/ ]& {$ V
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
0 b2 q1 ^9 w; S7 H8 L  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.
8 [5 {& H& P) K, `* V- b: l5 [  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.% \+ Y/ Z1 Y( I( c5 U2 s5 R
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:
0 o& m7 I" ?2 k' K, P3 v! MAfter running the model for 10,000 days, what was the average number of loads in each process?
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. e, |: q1 ^! j不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
9 w" R. L- S0 R) N( \move into Q_wait /*Capacity is infinte*/% k' D  |9 z( t) K/ m) P. K
move into Q_process /*Single capacity*/$ @) Y2 [. ^# |4 E# Z3 G

- r' c  P: k& r& v. a7 u  I  \8 S9 d8 s  buse R_A for n 60,10 min /*Resource A*/# T4 o* y! t. v) J7 A8 r" d
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send to P_B: S; ?4 r& d* V: I1 ^+ u- T
end
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  Q# `& q* ], }$ J; {) o  D$ YP_B and P_C is similar3 L/ G! D! \8 P8 k0 o2 @
triangular 30,60,90 min
3 ~7 I4 _0 P4 [4 Nu 60,30 min
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in P_C, you need to send to die.
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. d) @8 b% W6 ?* h) cThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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  D$ H: P0 t3 H
1 v" @. |+ a$ W+ gRemember 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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