Instantaneous failure rate, h(t) (h(t))

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Categories: Terms

The rate at which devices are failing referenced to the survivors (not to the initial number of units). Also known as hazard rate. h(t) = f(t)/R(t).

Synonyms:

Instantaneous failure rate, hazard rate

Cumulative hazard function
The fraction of units that have failed referenced to the survivors (not to the initial number of units). The value of this function at a specified time t₁ is given by the integral of the instantaneous failure rate (hazard rate), h(t), from t = 0 to t = t₁.
Hazard rate
The rate at which devices are failing referenced to the survivors (not to the initial number of units). Also known as instantaneous failure rate. h(t) = f(t)/R(t).

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About Fred Schenkelberg

I am the reliability expert at FMS Reliability, a reliability engineering and management consulting firm I founded in 2004. I left Hewlett Packard (HP)’s Reliability Team, where I helped create a culture of reliability across the corporation, to assist other organizations.

About Fred Schenkelberg

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