| Article ID: | iaor2009151 |
| Country: | Poland |
| Volume: | 35 |
| Issue: | 2 |
| Start Page Number: | 407 |
| End Page Number: | 414 |
| Publication Date: | Jan 2006 |
| Journal: | Control and Cybernetics |
| Authors: | Knopik Leszek |
| Keywords: | quality & reliability, statistics: distributions |
The author has previously introduced the ageing class MTFR (Mean Time to Failure or Repair) of lifetime distribution. In this paper, he shows that the family of MTFR is closed under weak convergence of distribution and convolution. It is demonstrated that the dual family MTFRD (in a particular case) is closed under mixtures.