What is FMEA and how is it used in corrective action?

2012-09-13

Written by: Jean Champlain, Supplier Development Manager The FMEA (Failure Modes and Effects Analysis) is a quality tool that was originally used in the automotive industry and nowadays in many other industries. It is used as a technique to: - Identify all failure modes that could potentially exist in a manufacturing process (PFMEA) or in the design phase of a product (DFMEA). - Define the frequency (O) of the apparition of each failure. - Determine the severity (S) of their impact of each failure. - Determine the reliability level of the current detection (D) of the failure. Each failure is then rated with a RPN value = O * S * D, where some failures will have a higher RPN and others will be less. The goal is to decrease the value of RPN where it is higher as much as we can. This can be achieved by implementing the following corrective actions: - Improving the process so that the failure does not appear very often (Reduce or even eliminate the O). - Develop a better system to detect the failure when it appears (Reduce or even eliminate the Value D). The decrease or elimination of the value O or D, or even both together will automatically reduce the value RPN to an acceptable result. The Process FMEA (PFMEA) is applied to any new manufacturing process before volume production, or after a major change happens in the process, such as new machine, location change, new process, etc. Pro QC provides this service to help factories improve their manufacturing process with the use of this tool. Contact your account manager for additional information.

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