REPLY Meaning of Stock/Level (SD6930)

[SDMAIL Jay Forrest]

Posted by  "Jay Forrest" <systems at jayforrest.com>

While following this thread I struggled with the feeling that there was a
difference between models that use soft variables to support exploration of
relatively concrete issues and topics and models that are specifically
concerned with the nature and significance of the soft variable. The former
feels  more rational and verifiable, while the latter raises concerns. In
additon, the chaining of soft variables or converging impacts of multiple
soft variables to a node in a quantitative model strikes me as posing a
difficult challenge for both formulation and validation. Jean-Jacques' logic
of striving to make the soft variable dependent on hard variables strikes me
as an appropriate ambition. 

Jay Forrest  
Posted by  "Jay Forrest" <systems at jayforrest.com>
posting date  Tue, 15 Apr 2008 08:45:17 -0500