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摘要
Design defects do not only degrade the quality of products, but also overrun budgets, extend schedules, and even jeopardize the success of product development (PD). Defect propagation result in a high probability of defect occurrence. In this study, a novel weighted directed network model for defect propagation is proposed from the perspective of design activities to reduce and control defect propagation involved in PD. First, the node impact measurement value matrix is provided by analyzing the relationships between the input and output parameters of design activities. Then, the concept of design activity node intensity is used as a quantitative index to evaluate the key activity nodes in defect propagation. The design defect control strategies are discussed from the perspective of key activity nodes based on the result of the evaluation. A case study of a crane arm is performed to validate the capability of the proposed approach.
