The FMEA was developed by the U.S. Army in the late 1940s as a military procedure (MIL-P-1629). It was used as a technique for assessment of reliability and to determine the effects of failures of systems or equipment. The failures were classified according to their effect on mission success and safety of personnel and equipment.
During the 1950s, the FMEA was used in the aerospace industry. The teams launched at Cape Canaveral could not afford to commit mistakes. They were always cautious about the possible setbacks and took steps to prevent these failures. Currently, the FMEA has become a basic technique for quality control, which has long been applied in the automotive industry. Ford, for example, requires all its subcontractors to perform an FMEA for each room. The FMEA is also increasing its input in other sectors.
The FMEA is a method of risk analysis based on the dysfunctional relationships of cause and effect. It relies on identifying failure modes of system components. Initially these define the scope of the study, definition of the topic and objectives.
The FMEA uses the experience of everyone to gather all information that is held and also to change the conclusions. The methods of group work must be known and practiced to ensure optimum efficiency. It is an essential criterion for success
The actors of the method include the applicant, who is the person or service that takes the initiative to begin the study and choose the topic of study. Then there is the decision maker who is responsible for the topic in the company and as a last resort and failing consensus has to make the final choice. The first two categories of people generally have no sharp technical skills.
The moderator is the guarantor of the methodology, the organizer of the group. He is responsible for setting the agenda of meetings, leading the meeting, its secretariat and monitoring of the study. Very often it is better to use an outsider or use outside service to be neutral.
The working group (a total of 5 to 8 people) is composed of responsible and competent persons, having knowledge of the system under study and can provide the information necessary for analysis.
Tags: FMEA; application; methods of working
[...] Semantic change actions o Increased Dependability. o Improved security. o Improvement of the environment. Summary of FMEA methodology: • The method involves four main steps: 1. Preparation: study necessary and functional analysis through a working group Failure Analysis: gives a list of failures, their causes and effects that are combined on a grid adapted by FMEA Grid FMEA and criticality Listing: after confirming grids criticality (Frequency, Severity and possibly detection mode), the Group assesses the criticality of each failure and prioritize these failures Actions to be taken and monitoring: there are actions to reduce the criticality of the most critical failures, a new dimension is achieved. [...]
[...] Trading in the frequency, severity and not detection enable prioritization of various failures. The frequency can be estimated that some kind of incident might happen once a year. Gravity shows the concept of danger (for the client) associated with the failure. The index of non-detection is used to evaluate the probability of non- detection of the failure before it reaches the user. Criticality rating Criticality: • is estimated from the frequency of failure and its severity; • determines the choice of corrective actions; • it sets the priority of the action; • it is a criterion for monitoring the predicted reliability of the equipment; Thus, the listing of criticality allows prioritization of various failures. [...]
[...] He is responsible and maker of costs, quality and deadlines. The first two people usually have no technical skills sharp. • Host: This is the guarantor of the methodology, the organizer of the group's life. It defines the agenda of the meetings, lead meetings; provide secretarial services and monitoring of the study. Very often it is an outside, or at least outside the service to be as neutral as possible. The working group (total of 5-8 people.) it is composed of responsible and competent people having knowledge of the system to be studied and may provide the information necessary for the analysis (although we cannot speak of what we know well). [...]
[...] Army in the late '40s as military procedure (MIL-P-1629). It was used as a technique for reliability assessment to determine the effects of failure of systems or equipment. Failures were listed according to their effect on mission success and the safety of personnel and equipment. During the 50s the FMEA has been used in the aerospace industry. Teams launch at Cape Canaveral could not afford mistakes. They always wondered what might happen and what they can do to prevent these failures. [...]
[...] As a first step, it is necessary to define the scope of the study: definition of the subject and objectives. It has often interest in this analysis working group. The FMEA uses the experience of everyone to gather all the information held by each other, but also to change the conclusions. Methods of group work must be known and practiced to ensure optimum efficiency. It is a criterion for success. Actors of the method: • Applicant: This is the person or department who takes the initiative to launch the study. He chose to study. [...]
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