Ventana software support forum

Posted by Nijland <lukkenaer@planet.nl> Coyle wrote: >> I am afraid that Lukkenaer is confused about time in SD models (he is >> not alone). (A). I think, I’m not confused about the different time-concepts. For the rest I agree, for the larger part, with Coyle’s comments, and enjoy the discussion. W...

Posted by Nijland <lukkenaer@planet.nl> >>MIN(normal_rate_of_winning_customers , potential_customers/dt) (see Coyle) >>MIN(Normal_Sales_Rate , Inventory/TIME STEP) (see Fiddaman) These constructions are dimensionally valid, but have a “scaling error” (see also the comment of George Richardson). The ...

Posted by Nijland <lukkenaer@planet.nl> What is the essence of feedback? The sigmoid time-series y = max / {1+EXP(-a *time) } ,without any loops, may be reformulated, as a system with two feedback loops, a positive one, and a negative one. dy/dt = max * y * (1 - y) This system is able to show expone...

Posted by Nijland <lukkenaer@planet.nl> Existing models of ""production of services"" Jean-Jacques Laublé Allocar wrote: ""The main difference between service and production, is that as the time is flowing, the service that is not sold is lost, while the product is stil...