The six aspects of project performance to be managed, as outlined in PRINCE2, are benefits, costs, timescales, scope, quality, and risk. Managing these aspects helps ensure that the project delivers its intended outputs while adhering to predetermined constraints and achieving desired outcomes.References: = PRINCE27 Foundation handbook and online resources

The project plan supports the 'manage by stages' principle in PRINCE2 by identifying major control points and milestones. These serve as points at which the project board can review progress and decide whether to continue with the project. This principle ensures that the project is manageable, controllable, and that decisions can be made with proper governance at each stage. References: PRINCE2 Foundation Handbook, Manage by Stages section.

The length of management stages in a PRINCE2project 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.References: = PRINCE2
7 Foundation handbook and online resources

The need to engage with external suppliers for delivering parts of the project is commonly related to the
'Commercial' project context in PRINCE2. This context involves considerations around contractual arrangements, procurement, and the management of supplier relationships which are crucial for projects relying on external vendors for key components or services.References: (PRINCE27 Foundation Handbook, AXELOS)

If projects are not aligned with the corporate business strategy, a potential problem is that the objectives of different projects may overlap. This can lead to duplicated efforts, resource wastage, and conflicts between projects, all of which detract from organizational efficiency and effectiveness. References: PRINCE2 Foundation Handbook, Project Alignment with Corporate Strategy section.