This report provides a comprehensive comparison between the HPT (Human Performance Technology) model, the ADDIE model, and Gagne's model, focusing on their applications in performance improvement and instructional design. The introduction highlights the purpose of the comparison, which is to analyze performance gaps and align the HPT model with these gaps. The report delves into the core principles and steps of each model, including the ADDIE model's phases (Analysis, Design, Development, Implementation, and Evaluation) and Gagne's nine-step process for instructional design. Furthermore, the report contrasts the HPT model with both ADDIE and Gagne's models, outlining their unique strengths and weaknesses. The conclusion emphasizes the impact of these instructional design tools and models on assessing performance and influencing educational programs and training. The report also includes references to relevant academic sources.