Projects which start with grand ideas, complex plans and huge budgets will quickly spiral out of control if checks and balances aren't applied at appropriate intervals by the right decision makers. This is necessary because of many factors, not least because we (all of us) aren't that good at putting together long complex plans and also because we (all of us) like to change our minds a lot.
PRINCE2 therefore demands that we plan and execute our projects in stages which represent a reasonable balance between the need to move forward and the realities of uncertainty, planning horizons and inevitable change. The method is therefore based on the use of management stages.
