The total time on test (TTT) concept has proved to be a very useful tool in many reliability applications. In this paper we illustrate the usefulness of the TTT-transform, a certain functional of the survival function, and an empirical counterpart called the TTT-plot when analysing some different burn-in models for both repairable and non-repairable units.
Funder: Swedish NaturalScience Research Council (1564-100);