Reliability Function Calculator
Enter component MTBFs to calculate reliability R(t) for series or parallel systems, along with B10 and B50 life estimates.
System Architecture
Series: any component failure → system failure. System MTBF < any individual MTBF.
Component List
After durability life testing of an electronic product, Weibull analysis is used to fit the failure data and compute reliability (survival probability) at a given time — verifying compliance with the customer's B10 life requirement (time to 10% cumulative failures) and planning warranty policy and preventive maintenance intervals. This tool suits limited failure samples (including censored data), estimating Weibull parameters (shape β, characteristic life η) and outputting reliability, failure probability, and failure rate at any time point.
Test 50 samples; 10,000-hour accelerated life test completed: 8 failed, 42 censored (still running) Weibull fit results: β (shape parameter) = 2.1 (β > 1, wear-out failures) η (characteristic life) = 45,000 hours Reliability calculation: R(10,000 h) = exp(-(10,000/45,000)^2.1) = exp(-0.0454) = 0.956 = 95.6% B10 life (time to 10% failures): t_B10 = η × (-ln(0.9))^(1/β) = 45,000 × 0.1054^(1/2.1) ≈ 18,500 hours
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