Estimation of service interval for timing belt replacement
Back-calculates the mileage service interval at two prescribed reliability levels from a normally distributed failure mileage (mean and standard deviation), for timing belt replacement scheduling.
z-value, interval 11.28
Service interval t, interval 1124 10³ km
z-value, interval 22.328
Service interval t, interval 2103 10³ km
a₁ = R(t₂)/R(t₁)0.8316
Method & references
- Timing belt replacement service interval, normal failure distribution.
The computation is a literal port of the original client-side JavaScript from /calculators/p1_2.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.