BS 5760-5:1991

Committees responsible
Foreword
0. Introduction
Section 1. General
1.1 Scope
1.2 Definitions
Section 2. Failure modes and effects analysis
2.1 Introduction
2.2 Procedure
2.3 Application
2.4 Supplementary information
Section 3. Criticality analysis
3.1 Introduction
3.2 Procedure
3.3 Supplementary information
Appendices
A. Summary of procedure for FMEA and FMECA
B. Examples of analyses
B.1 Ranked contribution approach to criticality analysis
B.2 FMECA Example 1. Fire protection system of an
     electric locomotive
B.3 FMECA Example 2. Sub-subsystem of a motor-generator
     set
B.4 Example of a process FMEA
C. Bibliography
Tables
1. Example of a set of general failure modes
2. Example of an expanded list of failure modes
3. Possible failure causes
4. Example of a set of failure effects (for a motor
     vehicle starter)
5. Example of a failure effects summary
6. Examples of failure effect severity scales
Figures
1. Example of the format of an FMEA worksheet
2. Relationship between failure modes and failure
     effects in a system hierarchy
3. Example of a criticality grid
4. Example of a criticality matrix showing criticality
     bands
B.1.1 Example of an FMEA worksheet
B.1.2 Example of a frequency analysis
B.1.3 Bar chart of subsystem contributions to system
       failure
B.1.4 Analysis of contributions to system failure
B.1.5 Bar chart showing ranked contributions
B.2 FMECA of the fire protection system of an
       electric locomotive
B.3.1 Block diagram of subsystems of a motor-generator
       set
B.3.2 Block diagram of enclosure heating, ventilation
       and cooling systems
B.3.3 FMEA of subsystem including failure rate
       assessment
B.4 Part of a process or manufacturing FMECA for
       machined aluminium castings

Practical guide to the application of reliability analysis techniques for the development of more reliable designs or processes. FMEA identifies possible failures within a system which affect system performance. FMECA considers the probabilities of failures occurring and the severity of the consequences to provide measures of their criticalities.