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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,  b% b7 w1 w7 D) b4 P( x
  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.
# j9 t# d" C! o4 k4 _  Loads are processed by each operator for the following time:6 `: m' @3 z1 \$ Q
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; c( j( k2 L- Y5 v" 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.
+ p0 s- L. Y' }3 d' `* g$ z  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
% s2 t( D6 {8 E# e1 H9 S. D2 zSend 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.% C" b$ u  o% a; f4 ^: n7 c& n8 W

; ?1 w" `7 `: ?2 \9 f问题:# _, a; o9 d/ ~3 M$ Q6 G! F! \
After running the model for 10,000 days, what was the average number of loads in each process?+ M' d& ?% u5 p
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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
" Q( e# b/ E6 tmove into Q_wait /*Capacity is infinte*/
$ E) H2 h. h( N% N0 wmove into Q_process /*Single capacity*/) U+ [( S/ B8 _+ P3 F1 K

5 m2 m  P+ v  e- k5 S  w: nuse R_A for n 60,10 min /*Resource A*/
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5 |- G0 P4 u2 L. g* h2 V# m; k2 Isend to P_B# `1 `* z9 t* O/ s4 f* L
end
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- j. b" }8 r; d- x! LP_B and P_C is similar6 \* E/ f3 T% N. X0 z
triangular 30,60,90 min- g/ B' m7 U8 H  \# f
u 60,30 min
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. B3 t# b; @$ Y) d( o' sin P_C, you need to send to die./ h: ?8 k' K) o9 h6 m- B

3 {; k. t  X0 B! v2 Z& v6 o3 TThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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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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