| Article ID: | iaor201524016 |
| Volume: | 61 |
| Issue: | 3 |
| Start Page Number: | 238 |
| End Page Number: | 243 |
| Publication Date: | Apr 2014 |
| Journal: | Naval Research Logistics (NRL) |
| Authors: | Shaked Moshe, Hazra Nil Kamal, Nanda Asok K |
| Keywords: | life expectancy, parallel machines, assembly line, assembly sequence |
In this article, we study aging properties of parallel and series systems with a random number of components. We show that the decreasing likelihood ratio property is closed under the formation of random minima. We also show, by counterexamples, that other aging properties are not closed under the formation of random minima or maxima. Some mistakes in the literature are corrected.