Building Products that Customers Love - The People

Product Manager: There needs to be one single person who owns the product process for each major product in the company.

User Interface Designer: Each product team should have least one person who is an expert in usability and design.

Product Marketing: Product marketing is not the same as product management. Product marketing is responsible for effectively communicating to internal sales-people, prospects, and customers regarding the product.

Product Development: Product development is responsible for understanding what is feasible, both technically and operationally based on available resources, working extremely closely with product management to understand requirements, and, ultimately the on-time, on-budget, on-quality delivery of the product.

Cory A. Eaves, Managing Director, General Atlantic talking about the important roles in a company. Nice summary to read.