Ventana software support forum

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> Hello, Surely your inquiry about the advertising process meant, ""in addition to Graham and Ariza, SDR 19(1) 'Dynamic, hard and strategic questions: using optimization to answer a marketing resource allocation que...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> Yes, Jim, consultants have some observations, on how the conceptualizing process is framed, what an appropriate sequence of events is, and usefulness pre-simulation. The framing of the process as ""modeling the pr...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> Thanks to Paulo Goncalves for pointing out the error in the 6th line of the path to the report on PA's 3G wireless competition analysis using SD and optimization. The correct version is: >> http://www.ofta.gov.hk/ >> "...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> One successful use of SD within a game-theoretic framework: The case of Hutchison Telecommunications Hong Kong versus its regulator, OFTA. >From the SD viewpoint, the question was whether another competitor would stimulate ...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> In answer to Fransisco Perez's question on studies of MRP and production planning: The System Dynamics literature has a major preoccupation with production planning and stability. Doubtless it starts with Jay Forrester's In...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> I must emphatically underscore Geoff's observations. Optimization itself is far from the end of analysis. Sometimes the results turn out to be completely implausible, because hill- climbing optimization often climbs its way...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> All, Erling Moxnes asks for 1. discussion on propriety of optimization in SD, and 2. whether SD then would be a branch of optimization. 1. There's a moderately extensive discussion of SD uses of optimization in Graham and A...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> A clarification on valuing impact of modeling in a ""phased approach"", and what can be done with a purely causal-diagram (non-quantitative) model: In recommending that a model could approximately value ...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> Hi, On the question of evaluating benefits of modeling: Over the last several years, it's become a standard practice for every PA dynamic modeling study to quantify benefit--schedule and cost for large projects, net present...

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> There's an explicit SD model of software maintenance built and discussed by a true guru of modern software engineering, Ed Yourdon, in Chapter 4 of his Rise and Resurrection of the American Programmer (Prentice-Hall, 1996)....

Posted by ""Alan Graham"" <Alan.Graham@paconsulting.com> Hello Ahmet, At risk of seeming to be a blunt stranger knowing nothing about your situation and interests, let me raise the possibility that the process of selecting a research area implied (or at least which I infer) from ...