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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,
3 n9 v& V2 y/ u: j  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.. u1 ^6 `6 s9 f0 W) {" y3 n
  Loads are processed by each operator for the following time:
; V/ @+ u$ r% }3 D. ?$ ?( s  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
" Q$ R' b8 k' P4 H  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.
5 s9 u" o7 L, S1 K: S  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.: O, h; g- X3 ]/ S3 `( y7 p! {5 G
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.$ y. m" b$ C( M2 i! h/ r

( f9 }: G+ `9 N' A$ s9 @! o( V" Y问题:
' D$ L) ~9 _% O1 [After running the model for 10,000 days, what was the average number of loads in each process?" h# D, k) ]7 ?9 s( C

/ P' Y, D) a5 ?( P不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
: W( w/ J8 i2 z; y  h1 B- `6 L* n7 umove into Q_wait /*Capacity is infinte*/* S  |$ ^" q) n& k
move into Q_process /*Single capacity*/1 u4 X8 i, N/ I: |
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use R_A for n 60,10 min /*Resource A*/, d" w0 }& z1 F# q  H
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send to P_B7 [8 U5 {+ A; H: Z& v
end  l4 Q1 E0 y3 {
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P_B and P_C is similar
4 G4 c; p0 L. S1 Y: f9 btriangular 30,60,90 min
/ f, ?4 v- J5 p# gu 60,30 min  t/ k- P6 r9 ]- o% `. W8 e+ B

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4 S! i0 G) D) }% y5 _1 b( }in P_C, you need to send to die.- x, U' S* o+ C$ R

; n  O- @! t7 BThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
6 s7 h0 V4 G, C1 \" D$ N. e" J& {/ w" K" K0 j6 \

6 ^6 X* t: }4 }& I+ m# D4 JRemember 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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