Which of these is true of project integration management?

Project Integration Management applies to projects of all sizes, not just larger ones; it is neither mandatory only for large projects nor inherently more effective in them.

Expert judgment is a primary tool and technique used within Project Integration Management processes, making it complementary rather than mutually exclusive.

According to the PMBOK Guide, Project Integration Management is explicitly the responsibility of the project manager and cannot be delegated. The project manager is accountable for integrating all project components - scope, schedule, cost, quality, resources, communications, risk, procurement, and stakeholders - into a coherent whole to achieve project objectives.

Triple constraints (scope, schedule, cost) are always relevant to Integration Management regardless of the Cost Performance Index value; a CPI of zero would indicate a critical performance issue requiring immediate integration attention.