Fault :
An incorrect step, process, or data definition in a computer program
which causes the program to perform in an unintended or unanticipated
manner. It is an inherent weakness of the design or implementation which
might result in a failure. A fault might be present and latent in the
systems like they were in Patriot Missile failure and Therac-25 accidents. These faults lead to a failure when the exact scenario is met.
- Fault avoidance – using techniques and procedures which aim to avoid
the introduction of faults during any phase of the safety lifecycle of
the safety-related system
- Fault tolerance – the ability of a functional unit to continue to
perform a required function in the presence of faults or errors
Failure: The inability of a system or component to perform its required functions within specified performance requirements
Error :
A discrepancy between a computed, observed, or measured value or
condition and the true, specified, or theoretically correct value or
condition.
http://vikashazrati.wordpress.com/2008/10/30/fault-failure-error/ http://hissa.nist.gov/chissa/SEI_Framework/framework_1.html
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