

Modeling accurately an operations research problem represents the most significant-and sometimes the most difficult-task. The solution of the optimization model is called the optimal feasible solution. you cannot produce negative number of items x1, x2 and x3). A non-negativity constraint limits the decision variables to take positive values (e.g. linear inequalities or equalities) of decision variables.

The scientific approach for decision making requires the use of one or more mathematical/optimization models (i.e. Operations Research is a scientific approach for decision making that seeks for the best design and operation of a system, usually under conditions requiring the allocation of scarce resources. Image by Arnold Francisca available at Unsplash Operations Research
