The FMECA method can be regarded as an extension of the method of Analysis of the Modes of failure and their Effects (FMEC) which was elaborate in the Sixties in the United States in the aircraft industry. Method of analysis of the reliability (reliability, availability, maintainability, safety), takes a new rise in the seventies, when certain European industries (chemistry, nuclear power, car) recovered it and added the concept of criticality. Thus FMECA was born which has the additional advantage of being able to determine the importance and the level of acceptability of the failures (criticality). Currently FMECA has become a basic technique for long term quality control in the car industry. Ford for example obligates all it’s sub-contractors to carry out a FMECA study for each part.