CONCLUSION
The present work deals with the Process FMEA study of a spark plug. Thus the spark plugs used in
various automotives have been analyzed and the expected failure modes have been duly observed and tabulated. The potential effects of failures are evaluated with their severity value and then the causes and their prevention are calculated along with their occurrence rating. By assigning the detection rating to the failure mode, the value of risk priority number is calculated. The risk priority numbers are specified which indicates the necessity of care for the reliability of spark plug. From the results of the critical analysis, the failure modes with greater risk priority number have been selected. The causes, effects and possible alternate solutions are given along with the ratings and priorities of action that decrease risk failure. Thus this process analysis will serve as a helpful tool to detect the occurring of failure modes and also assures in the effective functioning of the spark plugs.
This study provides a well documented method for selecting a spark plug with a high probability of successful operation and safety. As a result of this FMEA analysis, the down time of the vehicle is reduced by improving the reliability of spark plug. This approach can be well suitably applied to consumer products likeautomotives and their components, home appliances, etc., and other fields such as manufacturing, aerospace, instrumentation, medical, chemical processing, etc.