Search found 10 matches

by "Mark B. Wallace"
Sat Sep 13, 2003 7:22 am
Forum: SD Mailing List Archive
Topic: System Dynamics Applications in Power Plant Steam Cycles
Replies: 3
Views: 4404

System Dynamics Applications in Power Plant Steam Cycles

David, My thought is that TRIZ would be a more effective tool (than SD) for your purpose. ("TIPS" is the acronym for "Theory of Inventive Problem Solving," and "TRIZ" is the acronym for the same phrase in Russian. TRIZ was developed by Genrich Altshuller and his colleag...
by "Mark B. Wallace"
Sat Jun 28, 2003 8:45 am
Forum: SD Mailing List Archive
Topic: Question on nonconserved flows
Replies: 2
Views: 3397

Question on nonconserved flows

If you are going to create models of chemical reactions, it might be useful to learn a little bit about chemistry first. There is no such thing as an "atom of water." Water (H2O) is a molecule, not an atom. In your reaction, 300 atoms (of hydrogen and oxygen) combine into 100 molecules (of...
by "Mark B. Wallace"
Fri Apr 19, 2002 12:53 pm
Forum: SD Mailing List Archive
Topic: System Dynamics in software development
Replies: 7
Views: 8024

System Dynamics in software development

SD is not applicable to this domain, because its primary focus is quantitative, whereas the primary focus of UML and BON is qualitative. As others have mentioned, there is some literature on the application of SD to project management issues in software development. But there is none on the applicat...
by "Mark B. Wallace"
Wed Feb 27, 2002 1:59 pm
Forum: SD Mailing List Archive
Topic: Repenning/Sterman Paper Award
Replies: 0
Views: 3676

Repenning/Sterman Paper Award

I fear that the real picture is actually rather more bleak than that painted by Repenning and Sterman ("Nobody Ever Gets Credit ..."). In particular, their CLDs in Figures 1-5 assert that "Time Spent Working" has a positive (+) polarity to "Actual Performance." In my ex...
by "Mark B. Wallace"
Tue Nov 20, 2001 8:04 pm
Forum: SD Mailing List Archive
Topic: A causes B
Replies: 14
Views: 27772

A causes B

On 20 Nov 2001, at 19:10, daniel.jarosch@au.pwcglobal.c wrote: >I hope my issue is not too basic, but I do have question that has been > spinning in mind for a while. > Basically it is: How can we qualitatively uncover causation? Let me translate: "How should a scientist form hypotheses?" ...
by "Mark B. Wallace"
Fri Jun 08, 2001 11:39 am
Forum: SD Mailing List Archive
Topic: System Dynamics Certification
Replies: 12
Views: 9982

System Dynamics Certification

Alan Graham identifies certification policies in various occupations. It should be pointed out that, in some fields (especially medicine and law), practitioners must be not certified, but licensed. This is an entirely different concept. Certification is voluntary, whereas licensing is compulsory, an...
by "Mark B. Wallace"
Wed Jun 06, 2001 12:06 pm
Forum: SD Mailing List Archive
Topic: Electricity Regulation/Deregulation
Replies: 7
Views: 11323

Electricity Regulation/Deregulation

The key point to understand is that what happened here in California was not, repeat, not, a "deregulation" of the market for electricity. Persons who use that term to describe it are at best ignorant and at worst disingenuous. What happened was a restructuring (as in the Russian term, &qu...
by "Mark B. Wallace"
Tue Jun 05, 2001 10:03 am
Forum: SD Mailing List Archive
Topic: System Dynamics Certification
Replies: 12
Views: 9982

System Dynamics Certification

On 4 Jun 2001, at 7:58, Bill Braun wrote, in part: > Id like to know where I am deficient and continue to hone my skills > in those areas. Individual certification would address a good part of that. Not necessarily. Every certification process I know of relies solely on the infamous multiple-choice ...
by "Mark B. Wallace"
Mon Feb 26, 2001 12:06 pm
Forum: SD Mailing List Archive
Topic: Sustainability and property rights?
Replies: 4
Views: 9072

Sustainability and property rights?

My belief is that System Dynamics should be very useful here, as many of the arguments in favor of abrogating, or refusing to recognize in the first place, property rights, simply ignore secondary (not to mention tertiary, etc.) effects. If you arent aware of it already, please see: "The Nobles...
by "Mark B. Wallace"
Fri Nov 03, 2000 8:06 am
Forum: SD Mailing List Archive
Topic: SD modeling of Software Maintenance process?
Replies: 2
Views: 2950

SD modeling of Software Maintenance process?

Sharadha,

Please see the work of Dr. Ray Madachy on the software
engineering process, in general (not specific to maintenance).

http://sunset.usc.edu/people
ay/spd/


Mark B. Wallace PGP Key ID: 0xDE572FB8
From: "Mark B. Wallace" <mark.wallace@gte.net>