Ventana software support forum

=20 I have been asked to consider developing a strategic model to look at=20 transport policy. The brief asks for a "Stategic Assessment Tool" to=20 "assess the consequences of alternative transport and development=20 strategies". So far so good. Then it says the model must be ab...

I have been involved in two discussions recently on topics where it=20 seemed to me that SD could make a useful contribution, but they are=20 both outside my area of professional activity. I wonder if anyone has= =20 attempted to address either of them? =20 The first is welfare reform. Most reforms ...

=20 Appraisal of road construction projects in the UK is handled on an=20 econometric basis. Essentially it is cost-benefit analysis (CBA), and= =20 there is a computer program called COBA that has been used here for=20 many years to to this. The main benefit recognised in COBA is the=20 time saving...

John Gunkler raises some interesting questions. Reading "Industrial=20 Dynamics" a few years ago changed how I think about models, but=20 unfortunately it didnt change the views of the kinds of clients I=20 work for! Forrester and others have described vividly what they mean=20 by validity...

My thanks to those who offered such thoughtful responses to my earlier= =20 posting. =20 Bill Buchanan asked Transport of what? - its about movements of=20 people and freight in an urban area in the UK. =20 Bill Braun asked about the confidence limits. None were set - just=20 the text I quoted. I su...