Abstract: In order to effectively solve a series of quality reliability problems in product development process, an improved FMEA method based on hesitant fuzzy preference relation is proposed. Considering that the expert group mainly relies on relevant criteria and its own experience when evaluating different failure modes, there are problems of hesitation, ambiguity and uncertainty or self-preference. Firstly, the evaluation criteria of risk factors are fuzzified by hesitation, and the relative risk matrix of failure modes is processed by hesitation fuzzy preference relation. Secondly, the comprehensive preference value with hesitation fuzzy preference relation is combined with hesitation fuzzy evaluation information to obtain the improved risk priority number. A new failure mode risk assessment sequence is proposed to improve FMEA. Finally, the improved FMEA model is used to analyze and verify the risk in the process of product development, which makes the risk results closer to the actual situation, and then improves the success rate of R&D. It shows that the method is feasible and effective.

Key words: FMEA, hesitation fuzzy set, preference relationship, risk priority number, product development

摘要： 为有效解决产品在研发过程中存在的一系列质量可靠性问题,本文提出了一种新的基于犹豫模糊偏好关系的改进FMEA方法。考虑到专家小组对不同失效模式评估时主要依据相关标准和自身经验,存在犹豫模糊不确定或自身偏好问题。本文首先对风险因子的评分标准进行犹豫模糊化,并用犹豫模糊偏好关系对失效模式的相对风险矩阵进行处理;其次,将得到的具有犹豫模糊偏好关系的综合偏好值与犹豫模糊评价信息相结合,得到改进的风险优先数,从而得出新的失效模式风险评估顺序对FMEA进行改进;最后,利用改进的FMEA模型对产品研发过程中的质量风险进行分析验证,使得风险结果更接近实际情况,进而提高研发成功率,显示该方法可行、有效。

关键词: FMEA, 犹豫模糊集, 偏好关系, 风险优先数, 产品研发