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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 w+ A$ h! o# u( E0 }+ x3 y
  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.  e0 g0 N8 Y4 v9 @3 H% I1 f( z9 e
  Loads are processed by each operator for the following time:
5 z, o( T2 A1 M9 S0 k$ e  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.6 M1 c" G+ V  Y! N% \
  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.& y: v% S" f! a+ V  g
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.* E) X6 `# D+ x* U) L1 V! b
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.$ Z& w5 h6 a1 x; `
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问题:" {+ |' w& U0 l7 C& k, K
After running the model for 10,000 days, what was the average number of loads in each process?3 }& a; U9 _# s7 C  b0 B
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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
3 Q* E% P5 J) o+ qmove into Q_wait /*Capacity is infinte*/
; n5 E4 A8 j' q) X% i) Fmove into Q_process /*Single capacity*/' t9 W7 t- a6 K

. ?* R; s' {# L  _, w: M* uuse R_A for n 60,10 min /*Resource A*/
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( {* `; P$ ~; Y3 E9 R+ k; m) Lsend to P_B
4 x1 X# L: S# [' r# L, jend( a( ^- w7 W5 `$ L! R3 \  p
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P_B and P_C is similar8 E6 G1 J& _( u0 A1 [) e% S
triangular 30,60,90 min* B* c* t0 U# v: h( g6 `/ \8 f: {! ^
u 60,30 min  W; F0 ?- L: K  C' {

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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.
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0 w* B" W4 ^; w$ s+ M1 QRemember 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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