This paper describes some rules for combining component models into complete linear programs. The objective is to lay the foundations for systems that give users flexibility in designing new models ...

1. Formulate an LP model for this problem 2. Create a spreadsheet model for this problem and solve it using solver 3. What is the optimal solution 4.

We use the models of cognitive psychology and the early literature on linear programming models to understand how experts organize their thinking about models. We show that several different patterns ...