Beichelt, F.Nkadimeng, R.M.Yadavalli, S.S.2017-03-292017-03-292006-11Beichelt, F.,Nkadimeng, R.M. and Yadavalli,S.S. 2006. Maintenance policies based on time-dependent repair cost limits. South African Journal of Science 102 (11/12), pp.597-600.0038-2353 (Print)1996-7489 (Online)http://hdl.handle.net/10539/22257This paper considers two replacement policies for systems which, during their useful life, are subject to deterioration. Strategy 1: after a failure, the repair cost is estimated. If the repair cost exceeds a given limit, the system is not repaired, but replaced with a new one. So far, this policy has been analysed only for constant repair cost limits. This paper investigates the effect of applying time-dependent repair cost limits on the long-run maintenance cost rate. Examples show that, compared to the application of constant repair cost limits, a reduction of the maintenance cost rate between 5% and 10% can be expected. Strategy 2: the system is replaced as soon as the total repair costs arising during its running time exceed a given limit. Compared to the economic lifetime method, which is based on the average repair cost development and that requires the same data input, maintenance cost savings up to 20% could be achieved.en© 2006. The Author(s). Published under a Creative Commons Attribution Licence.cost-benefit analysismaintenancepolicy analysisrepairArticle