Search found 4 matches

by burley
Mon Nov 09, 2009 2:36 pm
Forum: Vensim
Topic: Priority queues
Replies: 1
Views: 1849

Priority queues

I have a "smart-FIFO" queuing problem with two kinds of information requests (IR's): 1) IR1 of highest priority has a min. processing time of 2 hours; 2) IR2 of lowest priority has a min. processing time of 1 hour; IR1 requests need to be dealt with before IR2 requests. Instead of having 2...
by burley
Mon Nov 09, 2009 2:24 pm
Forum: Vensim
Topic: Statistics
Replies: 1
Views: 2215

Statistics

I need to assess a minimum required simulation length from the convergence profile of mean and variance values of a simulated variable. The variable in case is an "item" variable created by a pulse (of value 1 and short duration) and residing in a queue. The statistics I need (for each tim...
by burley
Wed Oct 14, 2009 2:21 pm
Forum: Vensim
Topic: Conditional TIME_STEP...?
Replies: 1
Views: 1820

Conditional TIME_STEP...?

Is it possible (as part of the model) to make TIME_STEP conditional on the simulation interval, i.e. FINAL_TIME - INITIAL_TIME, rather than changing it in the Model Settings? Thanks.
by burley
Fri Sep 18, 2009 12:54 pm
Forum: Vensim
Topic: FORECAST
Replies: 1
Views: 1859

FORECAST

Whilst simulating, at t=t1 I want to know the FORECAST at t=T (T>t1) of two time functions (say f(T) and F(T)) where F(T) is the integral of f(t) over [t1,T] (iow F(T) = int from t=t1 to t=T f(t) dt). f(T) can be obtained by the FORECAST function, but how about F(T)...? Does anyone know how to do th...