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FIT Equation:
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FIT (Failures In Time) rate is a reliability metric that represents the number of failures per billion hours of operation. It is commonly used in reliability engineering to quantify the failure rate of components and systems.
The calculator uses the FIT equation:
Where:
Explanation: The equation calculates the failure rate normalized to one billion hours of operation, allowing for standardized comparison of reliability across different components and systems.
Details: Accurate FIT rate calculation is crucial for reliability analysis, maintenance planning, warranty forecasting, and making informed decisions about component selection and system design in various industries.
Tips: Enter the number of failures (count) and total operating hours (h). Both values must be valid (failures ≥ 0, hours > 0).
Q1: What does FIT stand for?
A: FIT stands for Failures In Time, representing the number of failures per billion hours of operation.
Q2: How is FIT rate different from MTBF?
A: FIT rate and MTBF (Mean Time Between Failures) are related but different metrics. FIT = 10^9/MTBF, where MTBF is expressed in hours.
Q3: What are typical FIT rate values?
A: FIT rates vary widely by component type and quality. High-reliability components may have FIT rates below 10, while less reliable components can have FIT rates in the hundreds or thousands.
Q4: When should FIT rate be used?
A: FIT rate is particularly useful for comparing reliability of different components and for calculating system-level reliability in series and parallel configurations.
Q5: Are there limitations to FIT rate calculations?
A: FIT rate assumes constant failure rate (exponential distribution) which may not hold for all components throughout their lifecycle. It's most accurate during the useful life period of components.