When potential Failure mode is generated the list of failure modes must be continuously updated. This result in a failure mode database which can be used for subsequent analysis.
|
The effect quantification is very significant as the change from minor to major results in change in the severity rating and hence the priority of taking action on this failure mode. |
The cause list should be taken up for review continuously and any additional knowledge should be linked to the cause and classified as one that is taken up for controlling the failure of preventing them. |
The failure modes should be updated
when a new symptom of the problem
manifests and should be dynamic to the
latest symptom of the problem. |
The effect should be studied in depth to
understand the severity of the problem.
An assessment of the customer
complaints is not enough. The effect
should encompass the complete
spectrum of tangible and intangible effect and the effect in the long term. |
The cause identified should be established
by facts and figures. The causes should be
substantiated with assumptions and study
and Test results. |
The failure mode is the manner in which a
component, Subsystem or System failed
or failed to meet the purpose which it was
intended to. |
The effect is the result of the failure mode as perceived by the internal and external customer.
|
The reason to the failure mode which when corrected results in the less or no deviation in the mode. |
FMEA occurrence and detection rankings should be evolved out of a long term understanding of the issues and there revenue implications. The ranking given should be based on consensus.
|
The customers view is vital for the inference on the effect. The effect should clearly state whether it violates any codes and standards and these effects are no violation of safety standards.
|
The list should mention every conceivable failure cause for each failure mode. The list should be aimed in such a way as the remedial action could be taken on them. |
Examples:
Poor logical skills
Frequent changes
Intermittent Operation
High Oxidation
Cracked fender
|
Examples:
Wrong transfer of funds
Excess time to develop
Excess load time
Poor finish
Excess Noise
|
Examples:
In correct code ,
In correct design Specification
Less time for analysis.
Incorrect Material quoted
Over stressing
|