Читать книгу System Reliability Theory - Marvin Rausand - Страница 122

When a car is used, the tires wear and the tire tread depth is continuously reduced and thereby the performance of the tires is degrading. When the depth becomes smaller than a certain legal limit (may be different in the different countries), the tires have to be replaced. A failure occurs when the tread depth passes . In this case, it is not possible to determine exactly the time of failure, and there is no dramatic change of performance when the failure occurs, but the risk of water planning and of puncture is considered to be unacceptable with a smaller depth than .