Many factors contribute to software quality and productivity, but development process has increased its share of the spotlight in recent years. The Pasteur process research program has been gathering data on a wide spectrum of software development organizations over the past two years. Most highly productive organizations exhibit the same patterns of organization, process, and introspection. These patterns are missing from organizations that are less productive or less successful. Using the emerging discipline of generative pattern languages, we can capture the patterns underlying successful projects and use them to establish organizational structures and practices that will improve the prospects for success in a new software development organization. This paper presents 43 such patterns. Managers in highly productive cultures at Lucid, Borland, and AT&T have confirmed the presence of most of these patterns in their organizations.