This guide clearly defines the purpose, goals, and objectives of an IBR. It also describes the attributes of an effective IBR and discusses a baseline review process that will lead to a better understanding of program risks. It provides a common definition and framework for the IBR Process. This process harmonizes, and to the extent possible, unifies the management objectives for all PMs. The IBR Process enables managers to effectively utilize the project Performance Measurement Baseline (PMB) to assess performance, and to better understand inherent risks. The IBR Process should continue throughout the life of a project.