Our IDT is based on a sociotechnical paradigm, where social interactions impact on technical decisions, which, in turns, influence future social interactions. These social and technical cycles continue dynamically and indefinitely, bringing out unlimited amounts of opportunities for innovation. Unlike traditional approaches where the social dimension of "who" and "why" questions and the technical dimension of "what" and "how" questions are treated separately in isolation, our sociotechnical IDT follows the cycle of "who-why-what-how" questions.
The four sociotechnical questions of "who-why-what-how" suggest that all required information and decisions in an innovation endeavor can be organized into four different types, each of which is called a "domain" in IDT. An IDT "domain" represents a distinguishable type of decisions for innovation. In other words, all decisions in the same domain must be of the same type in IDT. The reason for distinguishing the decision types and hence defining four decision "domain" is because, as the innovator makes decisions from the abstract market demands to the tangible physical artifacts in the downstream that can satisfy those upstream demands, the type of innovation decisions that he/she is making actually change characteristically and practically. It is important to understand these differences so that a conceptual structure can be defined to guide and support different decision-making activities along the innovation process.
The first IDT domain, which is the most abstract one at the upstream, is called the "market" domain in which all information and decisions are related to the customer needs and emerging wants that set the contexts for the innovation targets to be chosen by the innovator next. We use "market demands" (MD) to denote this decision domain in IDT.
The second IDT domain is called the "requirement" domain in which all information and decisions are related to the choices and specifications of requirements (of the things to be innovated in the functional space) that should be realized in order to satisfy the above market demand. We use "functional requirement" (FR) to denote this decision domain in IDT.
The third IDT domain is called the "concept" domain in which all information and decisions are relatedto the proposed ideas and concepts that
First, the purpose of those "who" question is to gather all information that relates to the targeted customers on the market, and hence it forms a decision domain, called the "market" domain. Second, the
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