Search found 5 matches

by Hamilton
Thu Jul 21, 2016 7:13 pm
Forum: Vensim
Topic: Modeling decision making with inventory
Replies: 5
Views: 5783

Re: Modeling decision making with inventory

I tried to put all the units but failed regarding "actual demand" and "market turbulence".

Anyway, I am attaching an updated model. Why can't I meet the actual demand (or the estimated demand)? I have been losing my sleep over this problem.

Thank you.

Hamilton.
by Hamilton
Thu Jul 21, 2016 6:29 pm
Forum: Vensim
Topic: Modeling decision making with inventory
Replies: 5
Views: 5783

Modeling decision making with inventory

Hi all. I have been trying to model a laboratory game that simulates business processes (producing, selling and managing inventory). Typically, the decisions are taken after each period. My model is a very simple one (see attached - "model test2"). It includes a condition for market turbul...
by Hamilton
Fri Mar 11, 2016 6:55 pm
Forum: Vensim
Topic: Unit error when using delay
Replies: 2
Views: 2524

Re: Unit error when using delay

Dear Tom,

Thank you so much!
by Hamilton
Fri Mar 11, 2016 2:49 pm
Forum: Vensim
Topic: Unit error when using delay
Replies: 2
Views: 2524

Unit error when using delay

Hi. Consider the attached model. When I use a dimensionless auxiliary variable with a delay function I got this kind of message regarding error on units: *********************************************** Error in units for the following equation: #Auxiliary variable>DELAY3>LV2# = INTEG( #Auxiliary var...
by Hamilton
Tue Sep 01, 2015 1:01 pm
Forum: Vensim
Topic: "Nobody ever gets credit" model
Replies: 5
Views: 7235

"Nobody ever gets credit" model

Hi. I am trying to replicate the model depicted in the Reppening and Sterman's groundbreaking paper "Nobody ever gets credit for fixing problems that never happened" (http://web.mit.edu/nelsonr/www/Repenning=Sterman_CMR_su01_.pdf). I am new to system dynamics and Vensim, so of course I am ...