The Research Of Product Design Decision Based On Value Frame

Product design is a problem-solving process composed of multiple decisions.The fundamental problem of design decisions is the problem of design value.In the sense of creating value,design decision-making is a value frame.In the sense of design research,the internal attribute of the decision-making object is the problem of value expression;The decision-making behavior of decision-makers is the problem of value framing and reframing.The aim of this thesis stem from the National Basic Research Program of China and vehicle design practice project,which has important theoretical and practical significances for the research on the value frame in the field of design decision-making.This thesis focuses on three issues: How to construct the research framework of product design decisions constructed from the perspective of value frame?What are the group composition and interest demand of design decision-making subjects? How to create design value through decision-making power?The researches combined theoretical research and empirical research and proposed the theoretical framework,mode and model.The theoretical research part mainly provided a theoretical basis for our study,primarily based on the research paradigm of design,related to the research foundation of psychology,management,economics,and other fields.The part of empirical research mainly provided the factual basis for the research of our study by,using the "case analysis method" " participatory observation method" "user research method" and "experimental method".The main results of the current thesis are as follows:Firstly,the research on design decision-making should reflect its role in value creation,that is,the significance as a value framework Taking two wheels motorcycle as an example,the value attributes of the decision-making object is studied.Using the literature research and workshop methods,a value attribute scale containing ten attribute labels is proposed and is summarized into three comprehensive value dimensions: social,technical,and commercial value.In this thesis,the modeling characteristics of the decision-making object is assessed and put forward that modeling is the way to present or express value.Taking the decision system as the research premise and the Doster model as the theoretical basis,the research framework of this thesis is put forward,and the research scope and focus of this thesis are established.Secondly,by combining literature and empirical research,this paper the main composition of design decision-making is studied.Based on the "participation" of decision-making,six types of decision-making main roles are identified,including designer,engineer,manager,supplier,dealer and user.The interest demand is studied through the combination of qualitative and quantitati ve research methods.The qualitative research results show that the decision-making object is the source of the interest demands of the decision-making subject,and the interest demands are the demand projection of the decision-making subject to the decision-making object in different contexts.The quantitative research results show the characteristics of interest demands of six types of decision-making subjects.The results show that: interest demands are the behavioral motivation of decision-makers.Design decisions need to focus on design objectives,efficiently promote the evolution iteration of design between different interest demands,and ensure the innovation and feasibility of design direction and results.Thirdly,the relationship between decision-making power and decision-making power is studied using the case analysis method.The research shows that decisionmaking power is the influence of the decision-making subject,which is expressed as the way and means for decision-making to promote design iteration.Decision semantics represents decision-making power.Three types of decision semantics lead to three different design iteration methods.The thesis puts forward that the selection and iteration of the design scheme are produced under the joint ac tion of the decisionmaking power of the decision-making subject.In this thesis the relationship between decision-making value preference and value generation in the process of design iteration are studied by using the methods of experimental research and case analysis.The results show that the value preference of the decision-making subject is the key factor affecting decision-making power.The decision-making power is consistent with the interest demands.The value preference of the decision-making subjects leads to the high level of the value attribute of the new scheme to meet its interest demands to generate new design value.Fourthly,based on the research contents and conclusions in Chapters 2,3,and 4and the premise of value judgment research,th is thesis establishes the product design decision methodology based on value frame and its application expansion.It is proposed that the decision-making subject judges the value of the design scheme based on the interest demands and then promotes the iter ation of the design scheme through the decision-making power so that the new scheme has a high level in the value attribute that can meet its interest demands,so as to generate new design value.As a frame of design value,design decision-making creates new design value based on taking into account the interests of six types of decision-making subjects.To sum up,from the perspective of the value frame,this thesis introduces multidisciplinary theories and research methods.It makes an in-depth study on product design decision-making through theoretical deduction and empirical research.It is proposed that product design decision-making is a value frame.The internal attribute of the decision-making object is the expression of design value.The behavior of the decision-making subject is framing and reframing the design value.The decisionmaking subject is composed of a variety of stakeholder roles.The interest demands and decision-making power of the decision-making subject are the abstractions of the design decision-making behavior.Based on the dual meaning of "how" in the Dorst model: interest demand is the driving force to produce design value,and decision-making power is the way to realize design value.The research provides a new perspective of design decision research and decision theory research,provide a new method of design decision research,and has the theoretical and practical innovation of design decisions.