The Common Body of Knowledge (CBK) refers to a comprehensive framework that outlines the essential knowledge areas and skills required in a specific profession or field. It serves as a guideline for practitioners to ensure they possess the necessary competencies to perform effectively. The CBK is often used in certification programs, such as those offered by ISC2 for cybersecurity professionals. In the context of project management, the CBK includes various domains such as scope, time, cost, quality, and risk management. By adhering to the CBK, professionals can maintain a standard of practice, facilitating better communication and collaboration within their industry.