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Open AccessArticle

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

1
School of Manufacturing Science & Engineering, Sichuan University, Chengdu 610065, China
2
Unclear Power Institute of China, Chengdu 610065, China
*
Author to whom correspondence should be addressed.
Symmetry 2019, 11(4), 576; https://doi.org/10.3390/sym11040576
Received: 6 March 2019 / Revised: 8 April 2019 / Accepted: 16 April 2019 / Published: 19 April 2019
(This article belongs to the Special Issue Symmetry in Mechanical Engineering)
The lack of information on the correlation between root causes and corresponding control criteria in the importance calculation of root causes of design problems results in less accurate determinations of core problems. Based on the interaction between customer needs, bad product parameters, and root causes, a hierarchical representation model of the design problem is established in this paper. A network layer of bad parameters, including various types of correlations, and a control layer, including technical feasibility and cost, are constructed. Then, a method based on the network analytic hierarchy process is proposed to rank the importance of root causes of the design problem and determine the core problems. Finally, a product design process based on the core problem solving is established to assist designers with improving design quality and efficiency. The design for the coolant flow distribution device in the lower chamber of a third-generation pressurized water reactor is employed as an example to demonstrate the effectiveness of the proposed method. View Full-Text
Keywords: customer needs; bad parameters; core problems; design process; conceptual design customer needs; bad parameters; core problems; design process; conceptual design
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Xie, Y.; Li, W.; Luo, Y.; Li, Y.; Li, S. A Method to Determine Core Design Problems and a Corresponding Solution Strategy. Symmetry 2019, 11, 576.

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