This case study provides a comprehensive analysis and design of a membership and facility management system for a gymnasium, focusing on Body Sculptors. It begins by outlining the six core processes of the Software Development Life Cycle (SDLC), including requirement gathering and analysis, design, implementation, testing, deployment, and maintenance. The report details the importance of each phase and their application to the gym's specific needs, such as managing staff, scheduling rosters, and tracking member activities. Furthermore, the study includes a class diagram illustrating the entities, attributes, custom methods, and relationships within the system, as well as use case diagrams modeling the interactions for manager staff scheduling and member registration. Finally, a PERT/CPM chart is used for project scheduling and coordination, leading to the conclusion that the proposed management system will significantly improve the gymnasium's operational efficiency and member satisfaction. Desklib provides access to similar assignments and past papers.