The document discusses various major construction projects around the world that are often perceived as failures. It notes that the causes of project failure are complex, but that the client plays a key role in contributing to project performance and success. The document outlines several "client illusions" where clients incorrectly assume things about their organization's ability to deliver projects successfully. It suggests focusing on how the public sector client in Northern Ireland can overcome constraints to improve project performance by implementing best practices, and how the construction industry can help clients with this process.