Research on application of process model for product concept creative design based on TRIZ and TOC

Abstract

Conceptual design is the key phase which confirms the principle solution that contains a great deal of innovative ideas. Theory of inventive problem solving (TRIZ) and theory of constraints (TOC) are two techniques for systematic innovation that can help designers and companies achieve innovative product solutions. TOC is used to discover contradictions and TRIZ is used to solve the conflicts in the process of product conceptual design, so we describe a process model to realize the theoretical interaction based on TRIZ and TOC. Beginning with the interaction between users and product to be designed, this paper makes a survey of user demand, summarizes in which stage of product development is and analyzes the directions of product technology evolution by selecting evolution routes of technical system. After design conflicts in product system are determined, the designer achieve the solutions of each sub-function of product according to their experience and heuristic association by using TRIZ tools. Designers let the users select the sub-function solutions from the morphological matrix and combine into a few suitable programs. Finally, the designer conduct program evaluation to obtain the optimal product solution by analytic hierarchy process (AHP). As a case study, an innovative design of the UV lampblack purification machine has been achieved with application of the process model.

New Product Development Method Trends and Future Research

“…TRIZ, which was originally developed in Russia [21], has led to significant technological developments. The TRIZ has been combined with methods, among others, including DFSS [17,22]), QFD and AHP [11]), QFD [47,48]), DEMATEL [49], gray relational analysis [50], and Theory of Constraint [51].…”

“…Based on the most used tools, TRIZ is the most used tool from the 50 selected papers with 17 papers. Papers that used TRIZ such as [3,10,11,12,17,18,21,23,24,25,26,27,47,48,49,50,51]. Only seven papers from the 17 papers have a case study that implemented the TRIZ method.…”

“…We could summarize that TRIZ is relatively not user-friendly to be implemented in studies than the QFD tool. Although TRIZ can be combined with other methods such as QFD, AHP and LCA [10], DFSS [17], KE [18,23], DEMATEL [49], GRA [50], TOC [51], the use of TRIZ is still in the conceptual model, so there is a gap to use the proposed tool that combined TRIZ with this other method.…”

Supporting resilient conceptual design using functional decomposition and conflict resolution

“…Many scholars have conducted several studies on the conceptual design solving process. Huang described a process model to realize a theoretical interaction that can help designers achieve innovative product solutions [34]. Based on this macro-model, Ehud proposed a parameter analysis methodology that centers on the repeated identification of dominant conceptual-level issues and relationships [35].…”

A Method to Determine Core Design Problems and a Corresponding Solution Strategy

“…The axiomatic design (AD) was adopted by Ko et al [14] to analyze the problems existing in the product system and solve them with the TRIZ method. The theory of constraints (TOC) method was developed to analyze the root causes of various problems in a product system through current reality trees (CRTs), to identify the conflicts with a conflict resolution diagram (CRD), and to solve these conflicts with the TRIZ method [15][16][17][18][19]. Although these methods provide effective strategies for analyzing various problems and solving conflicts that exist in a product system, there still seems to be some difficulty in identifying the core problems.…”