What is an advantage of applying the 'manage by stages' principle?

A key advantage of the 'manage by stages' principle is that it provides formal decision points for the project board. At the end of each management stage, the project board assesses the project's performance, the viability of the business case, and the plan for the next stage. This allows the board to decide whether to authorize the next stage, implement corrective action, or stop the project. These control points ensure the project does not proceed without senior management agreement at key intervals, preventing it from continuing in an uncontrolled manner.

A. The ability to use PRINCE2 for any project type is primarily an advantage of the 'tailor to suit the project' principle.
B. Aligning benefits with strategic objectives is a function of the business case theme and the 'continued business justification' principle.
D. Defining tolerances for delegated authority is a direct application of the 'manage by exception' principle, not 'manage by stages'.

AXELOS, "Managing Successful Projects with PRINCE2 7," 7th ed., 2023, Section 4.4: Principle: Manage by stages, p. 26.

AXELOS, "Managing Successful Projects with PRINCE2 7," 7th ed., 2023, Section 12.1: Purpose of the organization theme, p. 110 (describes the project board's decision-making role).