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�������պ����ѧѧ�� 2011, Vol. 37 Issue (11) :1395-1399    DOI:
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����ƽ, �����, ���׻�*
�������պ����ѧ �ɿ�����ϵͳ����ѧԺ, ���� 100191
Improved analysis method of risk priority number
Chen Zhengping, Fu Guicui, Zhao Youhu*
School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ��Թ��չ���ģʽӰ�����(PFMEA,Process Failure Modes and Effects Analysis)�з���������(RPN,Risk Priority Number)�����������ڵ�ȱ��,�ڷ���������Щȱ�ݵ�ԭ��Ļ�����,�����һ�ֻ��ڷ��ü��������ʵĶ����붨�����ϵ�RPN��������.�÷����ж��Է��������Դ�ͳRPN���������е��Ͽ�ȵȼ�����Ϊ����,�Թ��չ���ģʽ���Ͽ�ȵȼ���������;�������������Թ���ģʽ�������µķ�����ʧ������ֵ��ΪRPNֵ.�Ľ����RPN����������,������������ʹ�÷��������Ϊ�͹ۡ�׼ȷ.���,ʹ�øĽ����RPN����������������״���ij������˲���װ�乤�ս�����PFMEA����,ȡ�������õ�Ч��.
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Abstract�� Aiming at the defect of traditional risk priority number(RPN) method in process failure modes and effects analysis(PFMEA),the reasons of the defect thoroughly were analyzed, and a new RPN ranking method based on cost and probability was presented which is combined qualitative analysis with quantitative analysis. In the qualitative analysis , which is based on the estimation of severity ranking in the traditional risk priority number method, the severity ranking of the process failure mode was estimated. In the quantitative analysis, it used the expected cost caused by the failure mode as the risk priority number. The improved RPN method uses the quantitative numbers to make the ranking result of the RPN more objective and accurate. Finally, the new RPN method was applied to the PFMEA of the filter assemblage of a module in the modern radar, and a great result is obtained.
Keywords�� risk priority number   process failure modes and effects analysis   cost   probability     
Received 2010-07-02;
About author: ����ƽ(1985-),Ů,����������,������ʦ,czp126@gmail.com.
����ƽ, �����, ���׻�.�Ľ��ķ���������(RPN)��������[J]  �������պ����ѧѧ��, 2011,V37(11): 1395-1399
Chen Zhengping, Fu Guicui, Zhao Youhu.Improved analysis method of risk priority number[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(11): 1395-1399
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