The McKinsey 7s model divides a company's organization into 7 key elements: strategy, structure, systems, shared values, skills, style, and staff. These elements are interdependent, so a change in one requires changes in the others. The model emphasizes that the "soft" elements like shared values, skills, style, and staff are harder to measure but provide the foundation for sustained competitive advantage. An effective strategy must be aligned with all the other 6 elements to provide strong results for the company.