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Constructing an Innovative Design Model by Design Thinking to Evaluate New Product Development Effectiveness of Product-service System

Service design is a revolution to drive industry to be innovative. Design thinking, however, is the most effective way for the innovation during the process of service design. Service innovation, design methods, or tools of new product development are made for customers to create new value and expected to construct user-concerted product service system by macroscopic viewpoints of design and service experiences. Therefore, this research aims at constructing an objective systemic innovative design model through in-depth interview and grounded theory to discuss innovative factors of new product development and limitations of innovation for customer needs-oriented design thinking index construction and to review the completeness of current industrial product service system. The contributions of this research show six aspects of innovative design model as rules or principles of innovative development on new product development of industry including innovative design basis, innovative design development, innovative design capabilities, innovative design barriers, innovative design risks and effectiveness evaluation. For the aspect of innovative design basis, designer characteristics are the most influential beginning for product innovative design. For the aspect of innovative design development, the most significant is design process thinking model. For the aspect of innovative design capabilities, the most significant is designers' capabilities training. For the aspect of innovative design barriers, innovative known limitations and unknown restrictions are both important. For the aspect of innovative design risks, the most significant is product design rick management. For the aspect of effectiveness evaluation, the most significant is new product development effectiveness evaluation. Therefore, a systemic innovative design model based on six aspects is constructed to be a criterion of product innovative development of design for domestic industry. Product service system is a fully achievement for design service, and design service is a sequence of innovative journey that brings not only innovation for technology and products on new product development by design thinking but also commercial opportunities for industries with effectiveness.