Outcome-Based Education (OBE) model is being adopted at a fast pace at Engineering colleges in India at the moment. It is considered as a giant leap forward to improve technical education in India and help Indian Engineers compete with their global counterparts. Outcome Based Education (OBE) is an important demonstration Tool for student-centered instruction that focuses on measuring student performance through outcomes. Outcomes include Engineering Knowledge, Problem Analysis, Ethic, Individual and Team Work, Communication etc... It enables the students to perpetuate these outcomes as they perceive over the years of engineering. The students are evaluated for all the required parameters (Outcomes) during the course of the program. The attainment, defined by the NBA, gives a substantial opportunity for Tier-II students to bridge this gap of employability. In this present paper, a case study is developed through CO-PO mapping and attainment for Mechanical Engineering Students of Tier-II. The formulated rubrics assessment is indicative of a continuous improvement strategy that can be easily adaptable by faculty and students across engineering streams.