This document provides an overview of the National Overall Reference Architecture (NORA) methodology for developing enterprise architecture at government agencies in Saudi Arabia. It describes the 10 stages of the NORA methodology: 1) Develop EA Project Strategy, 2) Develop EA Project Plan, 3) Analyze Current State, 4) Develop EA Framework, 5) Build Reference Models, 6) Build Current Architecture, 7) Build Target Architecture, 8) Develop Transition Plan, 9) Develop Management Plan, and 10) Execute and Maintain. Each stage consists of key steps, inputs, outputs, and templates to guide agencies through the EA development process. The document also outlines continuous governance, reference models, and annexes with additional details.