Iso-Profit/Iso-Cost Method

The iso-profit (or iso-cost) method is a graphical way to locate the optimal solution when the feasible region is already drawn. Instead of testing every corner point, you draw a line representing a fixed value of the objective function $Z = ax + by$ and then slide it parallel to itself. The last point it touches as you move in the direction of increasing profit (or decreasing cost) gives the optimal corner. This …