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Chapter 4

3.5 Step 5: finding the optimum solution using the iso-contribution line

Having found the feasible region the problem now is to find the optimal solution within
this feasible region.

There are two approaches to this final stage.

 By inspection it is clear that the maximum contribution will lie on one of the
corners of the feasible region: a, b, c, d or e. The optimal solution can be
reached simply by calculating the contributions at each corner. This approach is
not recommended in the exam since it tends to be quite time consuming.

 By drawing an iso-contribution line (an objective function for a particular value
of C), which is a line where all points represent an equal contribution. This is the
recommended approach, particularly for more complex problems.

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