Outcome-based education (OBE) is an educational approach that focuses on what students should know and be able to do at the end of a learning process, rather than focusing solely on what content is taught or how it is delivered. OBE emphasizes clearly defined learning outcomes or competencies that students are expected to demonstrate. These outcomes are often referred to as "Competency Outcomes, Performance Outcomes" (COPO). COPO attainment refers to the achievement of these competency outcomes by students. In an outcome-based education framework, educators design curriculum, instruction, and assessment around these desired outcomes. This means that the curriculum is structured to ensure that students acquire the necessary knowledge, skills, and attitudes to achieve the specified outcomes. This paper describes improvement in CO-PO attainment and is successfully implemented for one of the core subject “BBA105- Financial Accounting and Analysis ” for BBA students at Maharaja Agrasen Institute of Mangement Studies, Rohini, Delhi. One of the best ways to present any course in easy manner for students is achieved by Outcome –Based Education (OBE).OBE definitely builds complete knowledge by simplifying complex topics into small steps by applying OBE Methodologies. The attainment of the skills by the students are measured based on the Program Outcomes (PO’s) specified by the accreditation bodies. Defining the Course Outcomes (CO’s), CO-PO attainment, will modify the traditional teaching methodology to a well planned self- learning and scored good results too that is explained in this paper.