Ventana software support forum

Posted by Bill Harris <bill_harris@facilitatedsystems.com> I've just found the time to read through this discussion. I've seen many good ideas; I'll perhaps add a few to the fray. I realize there are exceptions to each claim I make; I'm largely making broad-brush-stroke claims. I also realize some o...

Posted by Bill Harris <bill_harris@facilitatedsystems.com> >> Doing background research it seems that system dynamics ticks all the >> right boxes, but before going down a learning path wanted confidence >> I was in the right ball park. I'd give you two cautions. First, system dynamics is usually us...

Posted by Bill Harris <bill_harris@facilitatedsystems.com> I don't have any models to address your question, but I have done a bit of related philosophizing with references at http://www.facilitatedsystems.com/weblog/2006/06/s-curves-growth-and-discerning-your.html; check out its links, too, or sear...

Chariya Peterson"" <Chariya.Peterson@verizon.net> writes: >> Has anyone tried using SD on project costing? Would you like to share >> your experience / success stories? I wrote a short article for isee systems' Connector once on the topic (http://www.iseesystems.com/(pwmxldaxedxpdm45lqnrbg...

Malczynski, Leonard A"" <lamalcz@sandia.gov> writes: > I am trying to convert two circa 1975 DYNAMO models into another system > dynamics software tool. Len, If I dig deeply into my memory, I recall writing programs around what were essentially DYNAMO statements to create running simulatio...

Patricia.Quinn@ge.com writes: > 3) How does AnyLogic compare to Vensim and/or Stella (technically, > transparency, interface capability, training time, etc.)? Pat, I'm not familiar with AnyLogic, but their goals sound related to those of Paul Fishwick in his SimPack software and in his book Simulati...

Martin, I did an At Any Rate(tm) column for Pegasus on how Hewlett-Packard Company made product development decisions for many years. If I understand your premise correctly, their process is an example of one that ignores sunk costs. See ""You Need More Than Brilliant Ideas"" at ...

<R.M.Mooy@telecom.tno.nl> writes: > Do any of you have experience with such a setting? If so, which tools > are available and suitable for communication between modelers (or > modelers and experts)? I'm thinking of whiteboard tools, forums, online > drawing programs etc. Rutger, I spend the vast maj...

Bob, you asked good questions. Jim, you presented good ideas. I have another candidate to throw out. When I hear the sort of questions that Bob raises, my mental model of "make smaller and iterate more" begins to wake up. That is, I wonder if we would do better in addressing both Bobs ques...

"Jim Hines" <jimhines@interserv.com> writes: > I probably should stop there; Id be a shoe-in for heaven. I shouldnt say > "but".... Oh, darn here it comes ... Im such a slave to base desires: Ah, sweet virtue. Its so difficult. :-) > Thats why Im asking whether mathematical deriv...

"Jim Hines" <jimhines@interserv.com> writes: > and repeatable experiment. (Personally, I find repeatable experiment the > single most convincing process). Jim, if statistics is "the mathematics of the collection, organization, and interpretation of numerical data" (http://diction...

"Paul M. Konnersman" <konnersman@comcast.net> writes: > I found this claim rather shocking. It seems to me that the sun does > indeed rise every morning. You must have never lived in the Pacific Northwest! :-) It seems to rise here about 30 days out of the year; the rest of the time I pres...

Jean, Good luck! Just a few questions perhaps to stimulate thought and dialog: First, whats the purpose for which youre engaging in this program? Second, assuming the purpose might be to help other groups in your organization, what do they need? What do they say they need? Is SD _the_ answer for the...

There was a discussion not that long ago about this topic. Paul Fishwicks SimPack offers one such tool. Bill From: Bill Harris <bill_harris@facilitatedsystems.com> -- Bill Harris 3217 102nd Place SE Facilitated Systems Everett, WA 98208 USA http://facilitatedsystems.com/ phone: +1 425 337-5541

"JEAN-JACQUES LAUBLE" <JEAN-JACQUES.LAUBLE@WANADOO.FR> writes: > A model is correct if its outcome generates more profit (financial for me) > than its cost. Oh. I like that one. My only addition might be to try to separate out random occurences (a flip of the coin is cheap, and it might se...

1 "George A Simpson" <gsimpso4@csc.com> writes: > I have taken the position that for business process management, i.e., where > one needs to understand the merits of various pathway alternatives, > discrete simulation is the technology of choice. This seems to be working > out for me in pr...

2 "Jim Hines" <jhines@MIT.EDU> writes: > I can be a bit more precise in one area though: Bill Harris used the > terms "discrete-time / continuous-time" while I used the terms > "discrete-event / continuous event". Im pretty sure that Bill would > agree that in this thre...

"Jim Hines" <jhines@MIT.EDU> writes: > Im intrigued by George Simpsons statement "The essential difference > [between the discrete event approach and the way SDers usually model] is > that what is flowing in discrete simulation carries information, which > can affect the flow itself.&...

7 Jim, Take a look at the first paragraph of Barry Richmonds contribution on http://www.stewardshipmodeling.com/System%20Dynamics%20in%20the%20Elevator.htm. It works for me. Bill From: Bill Harris <bill_harris@facilitatedsystems.com> -- Bill Harris 3217 102nd Place SE Facilitated Systems Everett, WA...

Anastassios Perdicoulis <tasso@utad.pt> writes: > is there anything that works > on the LINUX platform? While it may not be what you expect, check out SimPack (http://www.cise.ufl.edu/~fishwick/simpack/simpack.html). It should work anywhere you have a C compiler. Bill From: Bill Harris <bill_harris@...

Anastassios Perdicoulis <tasso@utad.pt> writes: > is there anything that works > on the LINUX platform? While it may not be what you expect, check out SimPack (http://www.cise.ufl.edu/~fishwick/simpack/simpack.html). It should work anywhere you have a C compiler. Bill From: Bill Harris <bill_harris@...

Jay Forrest wrote: > I think you are asking a very important question. I think there is a bit of > chicken and egg aspect to the answer that is highly perceptual though and > should be recognized up front. Some time ago, we had a discussion about elevator speeches. Maybe your comment leads to anothe...

Im reading Michael Hammers Agenda, in which he makes the claim we have moved to a customer oriented market because we have much more supply than demand, thus putting the customer in control. Looking at that statement and other somewhat casual observations of the (US, at least) economy, should a reas...

In http://facilitatedsystems.com/expmgmnt.pdf and the associated http://facilitatedsystems.com/expmgmnt.itm, I created a model that had a factor for "management pressure": the amount of reaction management exhibits to poor (or good) lower management performance in expense management. As th...

Rutger, I appreciate that you care, and I do sense an opportunity, if people wish, to carry this group to an even higher level. That said, I would not at all be in favor of a move to YahooGroups. Its free, for sure, but I hear too many complaints about it from those who run it (Id have to ask a few ...