Building blocks of competitive advantage

How are the four building blocks of competitive advantage related to each other?
What role can top management play in helping a company achieve superior efficiency, quality, innovation, and responsiveness to customers?
Over time, will the adoption of Six Sigma quality improvement processes give a company a competitive advantage, or will it be required only to achieve parity with competitors?

Why bother segmenting the market? What advantages accrue to this effort?
What are ways one could segment consumer markets?
What are ways one could segment business markets?
Why is there a difference?