Search found 12 matches

by "Jack Ring"
Fri Nov 14, 2003 8:54 am
Forum: SD Mailing List Archive
Topic: Instability in Pull Systems (flexible kanbans)
Replies: 6
Views: 14675

Instability in Pull Systems (flexible kanbans)

One can certainly model, simulate and discern the system stability limits as a function of a) buffer size (push systems which operate in a "just in case" mode) and b) latency (time delays in either a push or pull mode of prompting system activity). Perhaps this should be seen as suppressio...
by "Jack Ring"
Sat Dec 01, 2001 1:08 pm
Forum: SD Mailing List Archive
Topic: Is it possible to omit soft variables?
Replies: 8
Views: 16870

Is it possible to omit soft variables?

Good point.
And even if some of the soft variables cannot be calibrated to "actuals"
the variables can still be quite educational as "what if" levers.

From: "Jack Ring" <jring@amug.org>
by "Jack Ring"
Sun Sep 02, 2001 4:12 am
Forum: SD Mailing List Archive
Topic: Preventing the next boom and bust
Replies: 12
Views: 17095

preventing the next boom and bust

I suggest asking one of the founders of the Venture Capital "industry" such as John Doerr. In my experience, having deflected several startups from becoming hubs and brokers, the issue is not spreadsheets vs. SD but is vision vs. hallucination. That is, most all had spreadsheets but the sp...
by "Jack Ring"
Mon Jul 30, 2001 11:20 am
Forum: SD Mailing List Archive
Topic: Preventing the next boom and bust
Replies: 12
Views: 17095

Preventing the next boom and bust

Good review, Kim. A major part of the dot bomb was a simple fact that not everything that can be programmed needs to be. Many companies were started without a Customer-Value Proposition, only an Investor-Value Proposition. Sure, both entrepreneurs and investors had visions. It is just that they coul...
by "Jack Ring"
Mon Jul 23, 2001 2:41 pm
Forum: SD Mailing List Archive
Topic: Human Behavior in System Dynamics Models
Replies: 9
Views: 11156

Human Behavior in System Dynamics Models

Thanks, George, summarizing the SD view of modeling human behavior. I do not question any of it. It is an excellent comparison point against which hopefully I can be more clear about my point. Perhaps you could tell me how SD could be used to examine and refine the policies surrounding the well know...
by "Jack Ring"
Thu Jul 19, 2001 8:56 am
Forum: SD Mailing List Archive
Topic: Human Behavior in System Dynamics Models
Replies: 9
Views: 11156

Human Behavior in System Dynamics Models

I am not aware of any (but that is a <1% coverage likelihood).
The "implicit" part is the problem because the causal factors at the
people relationship level are not subject to validation nor calibration.

Jack Ring
From: "Jack Ring" <jring@amug.org>
by "Jack Ring"
Tue Jul 17, 2001 10:55 am
Forum: SD Mailing List Archive
Topic: Electricity Regulation/Deregulation
Replies: 7
Views: 11323

Electricity Regulation/Deregulation

Andy, I think your view of human behavior models differs greatly.from mine Although the Sterman model to which you refer is quite interesting it is largely an economics model and includes no obvious variables for human behavior. In fact, starting on page 702 he clearly indicates that the humans invo...
by "Jack Ring"
Sun Jul 15, 2001 4:26 pm
Forum: SD Mailing List Archive
Topic: Electricity Regulation/Deregulation
Replies: 7
Views: 11323

Electricity Regulation/Deregulation

This may sound too simplistic but I think the solution to the "paradigm problem" is to do what Jay Forrestor often admonishes us. That is, use SD to demonstrate the inevitable outcome of continuing a behavior and then use it to discover better policies that have a chance of being implement...
by "Jack Ring"
Sat Jun 16, 2001 10:36 pm
Forum: SD Mailing List Archive
Topic: ST & SD in real life
Replies: 13
Views: 13226

ST & SD in real life

Hi all, This response is a little late because I have been otherwise occupied and it presents a somewhat broader view than Daniel may have intended but the question is so important that I feel compelled to bother you even though the thread may be dead. The following views are based on a rather uniqu...
by "Jack Ring"
Tue May 01, 2001 1:07 pm
Forum: SD Mailing List Archive
Topic: Fast demonstrations of complex behaviour
Replies: 14
Views: 18617

Fast demonstrations of complex behaviour

One thing a practitioner might get from "IT" is the great importance of Goal setting for humans involved in networks (and arent we all). I think this applies directly to the Tragedy of the Commons which is best resolved by "installing" a cascade from (common) Purpose to (applicab...
by "Jack Ring"
Sat Mar 31, 2001 5:41 pm
Forum: SD Mailing List Archive
Topic: Complex Adaptive System - Friend or Foe?
Replies: 9
Views: 31779

Complex Adaptive System - Friend or Foe?

Ivan, It is my opinion that if your purposes include discovering, describing or prescribing systems that do, or must, adapt in behavior and/or structure and/or content then System Dynamics, the practice, and perhaps some of the SD-oriented tools even, is complementary to CAS tools such as Swarm . An...
by "Jack Ring"
Sat Mar 31, 2001 4:38 pm
Forum: SD Mailing List Archive
Topic: Communicating results to less educated people
Replies: 3
Views: 8014

Communicating results to less educated people

Assuming the objective is to help the people become better farmers (perhaps only incidentally SD users) then I suggest that the following have to be made to come true: Farmers get clear on their purpose in farming and on the concepts pertinent to farming. Farmers get information on the degree to whi...