Retail trade plays an important role both in a global context and in Indonesia itself because it drives economic growth, creates jobs and shapes consumer behavior. Understanding the importance of industry growth, dynamics of competition and knowledge management are essential for optimizing business performance and achieving sustainable success. Minimarket O Mart is one of the small retail in the form of minimarkets in Indonesia, minimarket O Mart has problems in its business, namely inefficient business because O Mart is still in its standard operating procedures, because there is still no good SOP documentation, besides that the knowledge sharing activities within the company is also limited to chatting and has not been carried out formally within the company. The aims of this study are to propose a knowledge management system that can improve business processes at O Mart and to develop an implementation plan for the suggested knowledge management system, outlining the steps and strategies required for its successful integration at O Mart. Theories that support this research are the Definition of Knowledge, Fishbone Analysis, Knowledge Management Framework, People-Process-Technology Framework, SECI Model, KM Roadmap, and Implementation Plan. The research methodology is based on a qualitative research design involving data collection through interviews with employees from various departments of O Mart Retail Company. This research uses a knowledge management framework (People, Process, Technology) and the SECI model which will then produce a Knowledge Management Roadmap and also a Knowledge management implementation plan which is expected to overcome the problem of inefficient business processes at O Mart minimarkets.