When developing a model in LINGO, it helps to understand how the model is processed internally by the LINGO solver. The relationships in your model influence the computation time, the solution methods used by LINGO, and the type of answer returned. Here we’ll explain some of the different types of relationships in a LINGO model and how each type affects the solution search. An understanding of these topics is not required to use LINGO, but it can help you use the software more effectively.