Process FMEA considering Human Error Risk in Aerospace Manufacturing  
Author Shigeshi Yamashita


Co-Author(s) Isatada Matsune; Kodo Ito


Abstract For the development of aerospace products that require high reliability, it is also necessary to shorten the development period and to reduce the development cost by realizing front loading and applying concurrent engineering. By applying FMEA, which is one of the system reliability analysis methods, potential failure modes and their causes and effects which are related to system performance and manufacturing, are systematically analyzed, and improvements can be made early in the development cycle to reduce development time and costs. However, from the development and manufacturing practices of Japanese space rocket engines, more actual manufacturing quality troubles than assumed had been reported and these troubles lent to scrap costs and ultimately cost overruns after the completion of development. The cause of the increase in troubles is human error. As a result, RPN is also low and design and manufacturing improvements have not been made. To solve this problem, we have developed a method to evaluate the probability of P-FMEA occurrence from the viewpoint of the SHEL model proposed by F.H. Hawkins (1993). In this paper, we propose a P-FMEA considering human error risks in Japanese domestic liquid rocket engine manufacturing.


Keywords Process-FMEA, SHEL Model, human error, aerospace manufacture
    Article #:  RQD26-117

Proceedings of 26th ISSAT International Conference on Reliability & Quality in Design
Virtual Event

August 5-7, 2021