Article ID: | iaor19981726 |
Country: | United Kingdom |
Volume: | 46 |
Issue: | 2 |
Start Page Number: | 245 |
End Page Number: | 252 |
Publication Date: | Jun 1997 |
Journal: | Applied Statistics |
Authors: | Lindsey J.K. |
Keywords: | statistics: distributions, maintenance, repair & replacement |
Classes of two- and three-parameter multiplicative intensities models are presented. These have the advantage that they can be simply fitted by standard software. The two-parameter models include the Weibull and extreme value models, whereas the three-parameter models can have bathtub-shaped forms. The bus motor failure data are reanalysed to show that all five failures of the 191 buses can be adequately described by the same two-parameter multiplicative intensity model based on the squared logarithm of distance travelled in service since previous repair. This is a new member of the multiplicative intensity family, based on the squared logarithm of distance, or of time for survival data.