1Department of mathematics & computer sciences, school of economic sciences, Tehran, Iran
2Department of industrial engineering, Tarbiat Modares University, Tehran, Iran
3Department of industrial engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran
Most of data in a multi-attribute decision making (MADM) problem are unstable and changeable, then sensitivity analysis after problem solving can effectively contribute to making accurate decisions. This paper provides a new method for sensitivity analysis of MADM problems so that by using it and changing the weights of attributes, one can determine changes in the final results of a decision making problem. This analysis applied for SAW technique, one of the most used multi-attribute decision making techniques, and the formulas are obtained.