Total Time on Test Plots
Book chapter, 2008
In the 1970s the total time on test (TTT) plot, and its theoretical counterpart, the scaled TTT transform, was presented by R. E. Barlow et al. as a tool for model identification based on data representing lives of nonrepairable equipment. It has been used when analyzing different aging properties, optimising replacement policies and studying test statistics. Generalisations of the TTT plot have also been used for analysis of data from repairable units. It has also been suggested as a tool for the selection of active factors in design of experiments. In this paper we give an overview of TTT plotting and its practical and theoretical applications. A wide range of references are suggested for further reading.
failure rate
test statistics
total time on test
nonrepairable components
intensity function
failure data
nonhomogenous Poisson process
aging properties
age replacement
life distribution
TTT
Author
Bo Bergman
Chalmers, Technology Management and Economics, Quality Sciences
Bengt Klefsjö
Luleå University of Technology
Encyclopedia of Statistics in Quality and Reliability
1-7
9780470018613 (ISBN)
Subject Categories (SSIF 2025)
Reliability and Maintenance
DOI
10.1002/9780470061572.eqr102