Benyoub Khawla Ghizlene et Boutaga Sabrina.2026-10-082022-06-13https://dspace.esm-tlemcen.dz/handle/123456789/408In many industry sectors, managers are confronted with complex, large-scale, multi-objective problems. To make a decision on such a problem, it is usually necessary to optimize several, often conflicting, objectives at the same time. In this thesis, we present one of the models of multi-objective programming, the model of mathematical programming with goals ("Goal Programming" (GP)) is one of the best known and most used models. In fact, this model with its different variants has proven to be a very useful decision support tool in different decision contexts. These variants manage differently the information related to the decision context and the preferences of the decision maker. Through the different parts of this modest work we will try to show the relevance of GP as a decision support tool and which is the best way to solve the different problems to make a decision within the company using the LINGO softwarefrmake a desicionmulti-objective programmingGoal programmingvariantsThesis