Reliability Toolkit
Reliability Demonstration Test (RDT) Sample Size & Test Time Calculator
Build a binomial reliability demonstration plan for zero or allowable failures. Use the non-parametric method for a fixed mission-duration pass/fail test, or the Weibull modes to trade sample count against test duration.
Engineering inputs
Results
Your calculation
Enter the inputs and select Calculate.
Independent, representative test articles; one-sided confidence. Fixed-duration plans represent the field mission without inferred acceleration. Weibull time/sample plans use the supplied beta and acceleration factor. Test-time results are rounded up to 0.001 of the selected time unit.
Model notes
Independent, representative test articles; one-sided confidence. Fixed-duration plans represent the field mission without inferred acceleration. Weibull time/sample plans use the supplied beta and acceleration factor.
Engineering support
Need a reliability demonstration test plan?
Use these results for preliminary planning. SPACEREL can help define sample sizes, confidence requirements, stress conditions and defensible acceptance criteria.
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