A realistic evaluation of project progress relies on planning and controlling milestones. Startup companies face challenges in planning long-term and controlling short-term development. Previous studies have examined startup management practices, primarily focusing on business and financial planning, but rarely explored startup project management. This study investigates the contribution of the Critical Chain Project Management (CCPM) method for planning, monitoring, and controlling the entire startup project. Feedback from a startup company implementing the technique indicates that CCPM could benefit ventures in their early design and development phase.