Mean Time to Failure

Expectation of the time to failure [2]. NOTE The MTTF of an item can be longer or shorter than the design life of the system.

Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards


Mean Time to Failure

expectation of the down time

mean time to failure



Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standardss


Comments are closed.