Alireza Alinezhad - Assistant Professor, Department of industrial & Mechanical engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran.
Nima Esfandiari - MSc, Department of industrial & Mechanical engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran.

The sensitivity analysis for multi-attribute decision making (MADM) problems is important for two reasons: First, the decision matrix as the source of the results of a decision problem is inaccurate because it sorts the alternatives in each criterion inaccurately. Second, the decision maker may change his opinions in a time period because of changes in the importance of the criteria and in the policy of the organization over time. This in turn makes problem solving really time-consuming. Therefore, the best solution is to do sensitivity analysis. In this regard, this paper considers a sensitivity analysis in the QUALIFLEX method which is a compromise ranking method used for multi-criteria decision making (MCDM).

Sensitivity Analysis; QUALIFLEX, VIKOR; Multi-criteria Decision Making; Multi-attribute Decision Making