IstanbulUniversity
BusinessAdministration
IndustrialQualityControl
Assist. Prof. Dr. Özlem Akçay Kasapoğlu
Emre Sarı
1002080154
FMEAFMEA
Introduction
To
FAILURE MODE
EFFECTS & ANALYSIS
FMEAis a procedure in product development
and operations management for analysis of
potential failure modes within a system for
classification by the severity and likelihood of
the failures.
defination
FMEA cycle
Example
of
FMEA
Example of FMEA
Example of FMEA
Example of FMEA
Severity of Effect
10May result in safety issue or regulatory violation without
warning
9 May result in safety issue or regulatory violation with warning
8 Primary function is lost or seriously degraded
7 Primary function is reduced and customer is impacted
6 Secondary function is lost or seriously degraded
5 Secondary function is reduced and customer is impacted
4 Loss of function or appearance such that most customers
would return product or stop using service
3 Loss of function or appearance that is noticed by customers
but would not result in a return or loss of service
2 Loss of function or appearance that is unlikely to be noticed by
customers and would not result in a return or loss of service
1 Little to no impact
Some organizations such as SAE, AIAG, ISO 9000, and ISO/TS
16949:2002have established severity ratings.
Example of FMEA
Example of FMEA
Example of FMEA
Probability of Occurrence
101 in 2
91 in 10
81 in 50
71 in 250
61 in 1,000
51 in 5,000
41 in 10,000
31 in 50,000
21 in 250,000
11 in 1 Million
Similar to the ratings for Severity, each
organization like AIAG and ISO 9000have
their own ratings for occurrence.
Example of FMEA
Example of FMEA
Example of FMEA
Likelihood of Detection
10Absolutely uncertain that failure will be detected
9 Very remote chance that failure will be detected
8 Remote chance that failure will be detected
7 Very low chance that failure will be detected
6 Low chance that failure will be detected
5 Moderate chance that failure will be detected
4 Moderately high chance that failure will be detected
3 High chance that failure will be detected
2 Very high chance that failure will be detected
1 Almost certainty that failure will be detected