FMEA Handbook Version 4.1（2004英文版）.pdf

POTENTIAL
FAILURE MODE AND
EFFECTS ANALYSIS
(FMEA)

Reference Manual
Fourth Edition










First Edition, February 1993 • Second Edition, February 1995 • Third Edition, July 2001,
Fourth Edition, June 2008
Copyright © 1993, © 1995, © 2001, © 2008
Chrysler LLC, Ford pany, General Motors Corporation
ISBN: 978-1-60534-136-1
FOREWORD
4th Edition

The FMEA 4th Edition is a reference manual to be used by suppliers to Chrysler LLC, Ford Motor
Company, and General Motors Corporation as a guide to assist them in the development of both
Design and Process FMEAs. The manual does not define requirements; it is intended to clarify
questions concerning the technical development of FMEAs. This manual is aligned with SAE
J1739.

Summary of Changes in the 4th edition FMEA Reference Manual

The DFMEA and PFMEA methods described in the 4th edition FMEA Reference Manual include
those associated with design at the system, subsystem, interface, ponent level and the
process at manufacturing and assembly operations.

General Changes
• The formatting used in the 4th edition is intended to provide easier reading.
o An index is included.
o Icons are used to indicate key paragraphs and visual cues are used.
• Additional examples and verbiage have been provided to improve the utility of the
manual and to provide a closer tie into the FMEA process as it develops.
• Reinforcement of the need for management support, interest, and review of the
FMEA process and results.
• Define and strengthen the understanding of the linkage between DFMEA and
PFMEA as well as defining the linkages to other tools.
• Improvements to the Severity, Occurrence, Detection ranking tables so that they are
more meaningful to real world analysis and usage.
• Alternative methods are introduced that are currently being applied in industry.
o Additional appendices which have example forms and special ca