“…Protocols for eliciting people's knowledge, beliefs and preferences include interviews, ethnographic study, survey methods, focus groups, conjoint analysis, nominal group technique, concurrent verbal protocols, and many others (the literature is vast; see, e.g., Ericsson and Simon, ; Miles et al, ; Agarwal et al, ; Turco, ; Glaser and Strauss, ). Such methods have been used in system dynamics to, among others, elicit customer preferences (e.g., Sterman, , ch.…”