This document discusses the role of a Project Implementation Unit (PIU) in managing construction contracts and projects. It outlines the PIU's responsibilities in three key phases: execution, monitoring and control, and closure. During execution, the PIU directs project work, performs quality assurance, and distributes information to stakeholders. In monitoring and control, the PIU oversees project progress, manages changes, and reports performance. Finally, for closure the PIU completes the project/phase and closes procurement contracts by issuing completion certificates and collecting as-built documents. The document provides detailed steps for carrying out each of these responsibilities.