Hardware fault tolerance

Hardware fault tolerance ( HFT , Eng. Hardware Fault Tolerance ) is a measure used to describe systems with safety-related functions. The term is used in the IEC 61508 standard for functional safety and the like. a. electrical systems used.

An HFT = N indicates that N + 1 hardware errors, unfavorably distributed, lead to the loss of the safety function.

An HFT> 0 is practically necessary for high safety requirement levels and is often achieved through redundancy .