Determination of Interaction Between Criteria and the Criteria Priorities in Laptop Selection Problem Fatma So ¨nmez C ¸ akır 1 • Mehmet Pekkaya 2 Received: 6 February 2020 / Revised: 19 March 2020 / Accepted: 6 April 2020 Ó Taiwan Fuzzy Systems Association 2020 Abstract The statistic of global laptop shipment showed that 161.6 million laptops were sold, 65.23% more than desktop-PCs, and almost the same quantity as tablets in 2017. So, laptop demand is quite high and needs to be researched on what kind of criteria (properties) are crucial. Since there are more than one criteria, this study focuses on multi-criteria decision-making (MCDM) methods in selecting laptops. This study aims to determine the inter- action between criteria, and the criteria priorities in laptop selection problem that can be added/changing new features every day and to present the findings/results to the researcher/decision-makers. DEMATEL method is used for determining the interactions which are not observed in laptop literature, and fuzzy AHP is for criteria priorities. The price and brand image of a laptop have more interre- lated action than the other main criteria. According to results, the brand image is determined as the most impor- tant criteria. Along with the brand image, other/peripheral properties and price criteria have totally two-thirds priority among six main criteria. The brand image along with the price had a dominant effect on other criteria according to the interaction matrices/diagrams. This study also shows that criteria priority results should be considered along with interaction matrices/diagrams that may produce such fol- lowing information: speed, storage, monitor and other/pe- ripheral properties criteria have overall effecting feature but not strongly, while brand image is a transition criterion along with having the highest priority, and the price cri- terion is obviously being affected by all criteria. Keywords MCDM  AHP  Fuzzy AHP  DEMATEL  Laptop selection 1 Introduction Due to technological developments, computer usage is becoming more common every year. At the same time, there are continuous improvements in computer models and features produced every year. Computers can be examined under three main titles: desktop-PC, laptops, and tablets. Figure 1 shows net computer sales from 2010 to 2017 and estimated sales volumes from 2018 to 2023. Figure 1 shows that desktop and PC sales have been declining, but laptop and tablet sales have declined for a short time, laptop sales have increased again. Considering that the life expectancy of a computer is 5 years, it can be seen how widespread com- puter sales are. New properties are added to a product that is in such high demand in the market every year and this situation forces the decision-makers. The difficulty of this selection process stems from the existence of alternative brands, models and integrated features. The main motivation of the study is to contribute to the solution of the problem of laptop selection in individual or institutional terms within the laptop demand, which maintains its importance throughout the world. In this study, it is desired to determine the effective criteria for the laptop selection problem and to evaluate the criteria. Thus, by determining the priorities of these criteria with an analytical approach and revealing the interaction between the criteria, we have conducted these analyses to try to give & Mehmet Pekkaya mehmet.pekkaya@beun.edu.tr 1 Management Information Systems, Bartın University, Ag ˘dacı, Bartın, Turkey 2 Business Administration, Z. Bu ¨lent, Ecevit University (ZBEU), I ˙ ncivez, Zonguldak, Turkey 123 Int. J. Fuzzy Syst. https://doi.org/10.1007/s40815-020-00857-2