Software engineering economics.
Stop the life cycle-I want to get off!
About 90 percent of the downtime comes from, at most, 10 percent of the defects.
Negotiation builds a team as well as a set of requirements.
Poor management can increase software costs more rapidly than any other factor.
Agile methods derive much of their agility by relying on the tacit knowledge embodied in the team, rather than writing the knowleadge down in plans.