How much knowledge do project managers need?

Project managers need a comprehensive understanding of project management principles, methodologies, and best practices, as well as familiarity with the specific industry in which they operate. They should be skilled in areas such as risk management, budgeting, scheduling, and team leadership. Additionally, effective communication and stakeholder management are crucial for successfully guiding projects to completion. Continuous learning and adaptation to new tools and processes are also important for staying relevant in the field.