Search found 4 matches

by ABridle
Thu Sep 16, 2004 11:13 am
Forum: Vensim
Topic: Time Steps and If then else
Replies: 5
Views: 7382

Is there any way of having the change from type 1 to type 2 as a constant per month? When I put the units as dmsl/month (and change the units of conversion), I get the problem that not all the items convert from one type to the other at the specified time for different time steps. (Model adjusted an...
by ABridle
Tue Sep 14, 2004 11:16 am
Forum: Vensim
Topic: Time Steps and If then else
Replies: 5
Views: 7382

At time 14, when running with time step 1, all items have converted from type 1 to type 2.

However when running with a smaller time step, there are still type 1 items (when they should have been converted to type 2).

Hope that makes sense.
by ABridle
Tue Sep 14, 2004 10:46 am
Forum: Vensim
Topic: Time Steps and If then else
Replies: 5
Views: 7382

Time Steps and If then else

I'm using an 'if then else' statement to convert items of one type to another after a certain time. When I use different time steps, not all the items convert when the time hits 12 (works OK with 1, but not with 0.5 or 0.125). Can anybody explain why they don't convert or what I'm doing wrong - mode...
by ABridle
Fri Aug 20, 2004 3:00 pm
Forum: Vensim
Topic: Resetting Levels
Replies: 2
Views: 4388

Resetting Levels

I'm building a model with timesteps in months. I want to look at the levels every year and then reset to zero at time = 12, 24 etc. (So I can see the accumulated costs at year end.)
Is there an easy way to do this?