This book is devoted to the customization design of product/service system (PSS), making use of a systematic design process and a number of methods, especially Industrial Customer Activity Cycle Analysis, Service Quality Function Deployment, Service Function and Attribute Analysis, Modified Service Blueprint, Multi-Objective Optimization and Multi-Criteria Recommendation Method. The book is especially valuable in manipulating the problems of PSS requirements analysis, design conflict, design reuse and proactively response to customer. The methods in the book facilitate modular design of customized solutions and enhance PSS design efficiency. Presenting case studies, this book helps researchers and practitioners to understand the customization process and methods in the early development of PSS.