Enterprise architecture (EA) governance links EA plans to IT action, ensuring that IT planning, project portfolio management, and project execution align with enterprise goals. Two major approaches guide architects' involvement in governance processes: the collaborative model that applies proactive guidance via architect consulting and the review model that creates an architecture review board as a gating factor in the development and implementation process. EA groups should ensure that they are involved with governance at multiple levels — from the strategic to the project technology level — and that they balance collaboration with formal reviews.