Errors, Faults and Failures, these three terms are often very confusing.
Above diagram will help you in understanding the difference between them.
They are defined as follows:
Error: discrepancy between a computed, observed or measured value or condition and the true, specified or theoretically correct value or condition.
Faults (defect): abnormal condition that may cause a reduction in, or loss of, the capability of a functional unit to perform a required function.
Failure: The inability of a system to perform its required functions within specified performance requirements
Above diagram will help you in understanding the difference between them.
They are defined as follows:
Error: discrepancy between a computed, observed or measured value or condition and the true, specified or theoretically correct value or condition.
Failure: The inability of a system to perform its required functions within specified performance requirements
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