DFMEA, PFMEA, and MFMEA

Failure Mode and Effects Analysis (FMEA) is an analytical method used to ensure potential problems are considered and addressed throughout the product and process development process.

Failure Modes are the ways in which something might fail. The failures are actual or potential errors or defects, especially those affecting the customer. Effects Analysis refers to studying the consequences or effects of those failures.

Using FMEA, failures are prioritized by the:

  1. Seriousness of their consequences
  2. Frequency of their occurrence
  3. Likelihood of their detection

The purpose of FMEA is to take actions to eliminate or reduce failures, starting with the higher priority ones.

Design FMEA
The Design FMEA, referred to as DFMEA, supports the design process at the system, subsystem, interface, and component level to reduce the risk of product failures.

Process FMEA
The Process FMEA, referred to as PFMEA, supports the development of manufacturing and assembly operations by reducing the risk of process failures.

FMEA Reference Manual
The FMEA 4th Edition is a reference manual to be used by suppliers to Chrysler, Ford, and General Motors as a guide to assist them in the development of both Design and Process FMEAs. The manual can be ordered from AIAG at this web page.

A one page FMEA 4th Edition Errata Sheet has been issued and can downloaded at this AIAG web page.

MFMEA
A special Machinery FMEA (MFMEA) reference manual is available for tooling and equipment suppliers. The MFMEA 2nd Edition can be ordered at this AIAG web page.