Why is the Initiating a Project process used?

The Initiating a Project process is used in PRINCE2 to ensure that there is a thorough understanding of how the project's objectives will be achieved, which includes a definition of the project's scope, benefits, risks, and approach before significant resources are committed. This process helps in establishing a clear and shared understanding of the project's basis before moving forward. References: PRINCE2 Foundation manual, PRINCE2 official resources