Table of Contents
International Journal of Quality, Statistics, and Reliability
Volume 2011, Article ID 637079, 6 pages
Research Article

On Three Competing Maintenance Actions and the Related Condition Control

Department of Mechanics and Design, Tampere University of Technology, P.O. Box 527, FI-33101 Tampere, Finland

Received 8 February 2011; Accepted 5 June 2011

Academic Editor: Nikolaos E. Limnios

Copyright © 2011 Per-Erik Hagmark. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper considers three competing maintenance actions: corrective after failure, condition-based preventive to avoid failure, and scheduled. A stochastic model is set for the time relationship between corrective and preventive maintenance. This model defines a version of the so-called random signs censoring, and it leads to natural goodness measures for condition control. The effect of condition control on important observable and unobservable indicators is studied. The latter half of the paper considers static Weibull models for the time to failure and the effect of condition control; the main contribution is a calculation method that derives the four model parameters from four figures of input data. Corresponding parameter experimentation is demonstrated on maintenance cost analysis and condition control design.