This book takes readers on a comprehensive journey through ten chapters, seamlessly blending insights from the introductory chapter emphasizing the importance of human resource research with subsequent chapters delving into the complexities of evaluation, program conceptualization, and the integration of Theory of Change and Logic Model. The critical examination of prominent evaluation models, exploration of Participatory Evaluation's role, and the need for an integrated evaluation model are highlighted. The narrative culminates in a practical illustration of the integrated model, emphasizing its effectiveness, insights gained, and contributions to the field, while acknowledging limitations and offering recommendations for improvement. The book serves as a valuable resource for HR practitioners, evaluators, and organizational leaders, providing practical guidance and contributing substantively to the improvement of HR practices and organizational performance.