This document discusses factors that can help companies build and sustain competitive advantages. It analyzes leadership, organizational culture, design, and systems. Leadership is important through setting vision, mission, and governance. A company's values and culture also influence competitive advantage. Resources and capabilities are key, and must be valuable, rare, imperfectly imitable, and non-substitutable to provide sustained advantages. The document examines early strategy models and proposes that integrating multiple internal and external factors is needed to identify and sustain sources of competitive advantage.