Strategic management is often called a "capstone course" because it requires students to use knowledge from prior courses to chart organizations' futures. Performing an external audit generally requires the most time in strategy formulation, as it involves identifying competitors' strengths and weaknesses. Strategy implementation is often the most difficult stage because it requires commitment from all employees. It is important to integrate both intuition and analysis in strategic management, as neither alone is sufficient for good strategic decisions. Vision and mission statements greatly facilitate reaching agreement on strategies, objectives, and policies.