Integration of Operational Competitiveness Rating Analysis (OCRA) Methods and Rank Order Centroid (ROC) in Selection The Best Chatting Apps

As technology develops, social media is very useful for the people of Indonesia, especially in North Sumatra in interacting and communicating without knowing distance, place and time. Social media that is often popular and always used by all circles of society is a chat application where the chat application in the current era is very useful for people, both young and old, and those who are far away can only communicate via cellphone. Chat applications can not only send a typed message, but chat applications can also be used for telephone calls, video calls, voice messages, document files, photo files and so on. In this study, the aim was to build a decision support system (DSS). Which has a function as a tool to determine decision making in the process of selecting the absolute best chat application. By applying the ROC (Rank Order Centroid) and OCRA (Operational Competitiveness Rating Analysis) methods, it is possible to produce weight values ??and alternative preference values ??that are ranked first. So that it can be the best chat application found in the A1 alternative, namely Whatsapp with a value of 2.05.