This document serves as a practical guide to competency management, detailing principles, models, and implementation strategies for varying levels of expertise, from foundational concepts to advanced integration with quality assurance and risk management. It addresses the distinctions between competencies and performance, explores the usage and effectiveness of competency models across organizations, and emphasizes the importance of measurable competencies. Challenges in validating competency-performance relationships are acknowledged, alongside recommendations for selecting and customizing competency frameworks based on organizational needs.