Definition
Failure rate is the rate or conditional frequency at which devices in a population fail over time or use under stated conditions, commonly denoted by λ and expressed in units such as failures per device-hour or failures in time (FIT).
Application
Semiconductor reliability programs use failure rate to quantify field or accelerated-test reliability, compare technologies or lots, and support lifetime and qualification decisions; the rate may vary across early-life, useful-life, and wear-out regions.
Related search terms
Fail rate; hazard rate; FIT rate
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Related concepts
Evidence and further reading
- Evidence from ti.comhttps://www.ti.com/quality-reliability/reliability/terminology.html
- Evidence from fda.govhttps://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/inspection-technical-guides/reliability-manufactured-products