Qualitative data

One of the problems in every simulation is to collect data for simulation model. In many case the quantitative data is not available and the researcher need to feed the model by her assumption or understanding of the system. the following paper can be helpful to use quantitative data for system dynamcis.

Collecting and analyzing qualitative data for system dynamics: methods and models

http://www3.interscience.wiley.com/cgi-bin/abstract/107060999/ABSTRACT?CRETRY=1&SRETRY=0