This Active Model for Example 3.1 appears in myomlab. It allows you to see the effects of performing paired swaps of departments.

QUESTIONS
1. What is the current total weighted-distance score?
2. Use the swap button one swap at a time. If the swap helps, move to the next pair. If the swap does not help, hit the swap button once again to put the departments back. What is the minimum weighted-distance score after all swaps have been tried?
3. Look at the two data tables, and use the yellow-shaded column to put departments in spaces. What space assignments lead to the minimum cost? What is this cost?