This following model illustrates, among other things, the use of a dense derived set in a blending model. In a blending model, one is blending raw materials into a finished product that must meet minimal quality requirements on one or more dimensions. The goal is to come up with a blend of the raw materials to satisfy the quality requirements at minimal cost.

This model may be found in the SAMPLES subdirectory off the main LINGO directory under the name CHESS.