Functional safety: Fault, Error and Failure?

Caution: most of the contents are from ISO26262. If you learn more about them, you'd better buy the ISO document. 

According to ISO26262, terms are defined as below. 

conditions that cause malfunction.

If Fault has occurred, Error is followed too, the error is the gap between the measured value and calculated value, A.K.A delta value. 

the number of "error" is higher than the threshold, It leads "failure"

unintended delta value occurred, the item or the element is not available to operate its own function.

Special Thanks: Mr. Spearhun.