The length of management stages in a PRINCE2 project can be influenced by the availability of the project board to review and approve key decisions at stage boundaries. This ensures that stages are planned around when decision-makers can participate and provide necessary guidance or approvals.
= PRINCE2 7 Foundation handbook and online resources

The change budget in a PRINCE2 project is designed to fund changes that involve an increase in the agreed scope of the project. Such changes typically require additional budget allocations as they extend or modify what the project initially planned to deliver. References: PRINCE2 Foundation official study guide and online resources.

During the 'Initiating a Project' process in PRINCE2, the project is considered from the perspective of the project board. This process ensures that the project board has all the necessary information to commit to the project, understanding its scope, timescales, costs, risks, and overall approach before granting formal approval to proceed.
PRINCE2 Foundation Manual

The project manager should review the 'issue register' to know what modifications have been proposed to an approved product during the stage. The issue register records all issues that may impact the project, including requests for change, concerns, and off-specifications, providing an overview of current and potential problems affecting project products. References: PRINCE2 Foundation training materials and issue management guidance.

The application of the "Continued Business Justification" principle in PRINCE2 helps to define what should be included in a project. This principle ensures that a project remains viable and relevant, with a clear justification for starting and continuing each stage of the project. It supports decision-making about the inclusion of specific components or activities based on their contribution to project objectives and expected benefits. References: PRINCE2 Foundation Handbook, Continued Business Justification section.