discrepancy between a computed, observed or measured value or condition and the true, specified or theoretically correct value or condition

NOTE 1 to entry: Errors may be due to design mistakes within hardware/software and/or corrupted information due to electromagnetic interference and/or other effects.

NOTE 2 to entry: Errors do not necessarily result in a failure or a fault.

[SOURCE: IEC 615084:2010, 3.6.11]