%0 Journal Article %T Decision making model based on fuzzy AHP and TOPSIS using weakest t-norm operations %J Annals of Optimization Theory and Practice %I Firouzabad Institute of Higher Education %Z 2588-3666 %A AGGARWAL, NIKUNJ %D 2021 %\ 02/26/2021 %V %N %P - %! Decision making model based on fuzzy AHP and TOPSIS using weakest t-norm operations %K AHP %K Decision-making %K TOPSIS %K linguistic variable %K weakest t-norm %R 10.22121/aotp.2021.271299.1061 %X As the process of determining the best ODM (Original Design Manufacturer) company under theseveral criteria as service quality, manufacturing capability, financial capability etc to the buyercomes under the Multi Criteria Decision Making (MCDM) problem contains both quantitative andqualitative factors. In addition, vagueness is also a big challenge in decision theory due to therapid development of economic and social uncertainties. In order to accumulate the phenomenon offuzziness in the decision making, an attempt has been made in this work to present a methodology for solving the MCDM which is based on AHP (Analytical hierarchy process) and TOPSIS (Techniqueof order preference by similarity to ideal solution) by using weakest t-norm operations. Linguisticvalues are used for representing the vagueness of the data in the form of triangular fuzzy numbersand the proposed method is demonstrated through a case study effectively. %U