A FMEA method for electronic devices based on annotating functional roles

In order to reduce the maintenance cost, the design of complex electronic devices need to consider Failure Modes and Effects Analysis (FMEA). Traditional FMEA method in face of complex devices is usually lack of a formal specification in analysis process of failure modes and causes, which is easy to cause confusion and chaos; the results are prone to duplication or omission; the support for design phase is also weak. Above all, this paper presents a FMEA method for electronic devices based on annotating functional roles. Firstly, the functional roles and their corresponding failure modes are introduced; secondly, possible failures, that each functional role may experience, are analyzed and a formalized analysis method based on stress event is proposed; finally, analysis process of the FMEA method is illustrated with avionics system battery as an example. The method presented in this paper can effectively improve the efficiency and accuracy of failure analysis for electronic devices, and improve the ability of FMEA to support the design phase.