Fixed price contracts are often used by customers to control costs and reduce risk, but they can lead to scope wars between the customer and supplier as each tries to maximize their own interests. While estimates are educated guesses, scrum helps manage a fixed price project by prioritizing and sizing the backlog, having frequent reviews to catch misunderstandings early, and managing expectations and delivery dates. On one project, using scrum allowed the team to deliver an initial release on time with reduced scope and a second release for the remaining work, satisfying the customer's needs within the fixed budget. Scrum can work for fixed price projects if expectations are managed openly and the process is not abandoned.