Construction by Replacement

[Bill Braun]

The article of this name by Hines et. al. in the January-March SDR mentions the inclusion of their hierarchy of SD molecules in the MIT Process Handbook. I am unable to locate the hierarchy. The specific examples of "bathtub" and "aging chain" mentioned in the article returned no entries. A search for "system dynamics" returns but one entry.

Any suggestions on locating the hierarchy in the handbook?

Bill Braun

[Bobby Powers]

Hi Bill,

Funny you asked, I just was looking into this yesterday. I've found:
http://web.mit.edu/~paulopg/www/Hierarchy.pdf - an overview of the new hierarchy (from here)
molecule.pdf - a detailed overview of the older hierarchy (installed with the Molecules Vensim add-on)
http://web.mit.edu/~paulopg/www/Constru ... cement.pdf - the original paper

Bathtub and aging chain are described probably in the most detail in molecule.pdf, and when you install molecules you can see their implementation in Vensim as well.

[Bill Braun]

Hi Bobby,

I did locate all three of the documents you cite. My read of the article (as well as a mention in the original paper you linked to) makes specific reference to entries (200 of them) in the MIT Process Handbook. I am most interested in them.

Some comments in the articles appear to draw a distinction between the research oriented Process Handbook and a more "public" one. References to both appear to land in the same place (http://ccs.mit.edu/ph/).

Also, there is a "Logout" link on the MIT Process Handbook but no corresponding "Login". I wonder if that is a factor.

Bill

[Bobby Powers]

Its possible its in the Windows version, available here:
http://sourceforge.net/projects/phrep/f ... esearchPH/

(unless you tried that already, you seem to be a step ahead of me!) It requires a commercial DLL which isn't on sale anymore, I plan on emailing the company later today about it. Will let you know what I find out.