Six (or so) things you can do with a bad model
Operations Research
Soft systems methodology in action
Soft systems methodology in action
An assessment procedure for simulation models: a case study
Operations Research
Cognitive and developmental factors in expert performance
Expertise in context
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This is the second paper in a series of three (Murphy 2005a, b) on the practice of operations research. In the first paper I described an overall framework for a theory of practice and discussed the potential of cognitive science as an organizing framework of the knowledge and skills that make for good practice. Expertise in the context of OR practice consists of technical knowledge, institutional knowledge, and procedures and heuristics for bringing that knowledge to bear on the problem at hand and organizational issues. I illustrate technical expertise and heuristics using linear programming modeling and infeasibility analysis. Soft-OR techniques are useful for developing an understanding of the more complex and ill-formed issues an organization faces.