The Analytic Hierarchy Process(AHP) Founded by Saaty in 1980. It is a popular and widely used method for multi-criteria decision making. Allows the use of qualitative,as well as quantitative criteria in evaluation. Wide range of applications in systems engineering CLGO+ - The Analytic Hierarchy Process (AHP)  Founded by Saaty in 1980.  It is a popular and widely used method for multi-criteria decision making.  Allows the use of qualitative, as well as quantitative criteria in evaluation.  Wide range of applications in systems engineering