The textbook "Design Performance" offers a comprehensive analysis of performance improvement in the field of design development. It highlights the challenges associated with the uniqueness and novelty of design processes and examines how these aspects influence the definition, measurement, and management of performance. The authors, Francis J. O'Donnell and Alexander H.B. Duffy, combine insights from general research on business process performance with specific aspects of design research to develop a robust methodology for modeling and analyzing design development performance. The book presents three models that capture the key factors of efficiency and effectiveness in the design process, thus providing a foundation for performance assessment and management. This thorough examination makes the work a valuable resource for professionals and researchers engaged in optimizing design processes in the industry.