{IFRA∗t0} and {NBU∗t0} classes of life distributions

✍ Scribed by Li Zehui; Li Xiaohu

• Book ID: 104340541
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 100 KB
• Volume: 70
• Category: Article
• ISSN: 0378-3758
• DOI: 10.1016/s0378-3758(97)00188-2

✦ Synopsis

The properties of IFRA and NBU of a component have been widely used in the theory of engineering reliability. In this paper, we deal with two new classes {IFRA * t 0} and {NBU * t0} of life distributions. The ÿrst is characterized by an increasing failure rate average after t0, while for the second the life length of a new item is stochastically larger than the residual life length after t 0. The properties of these classes are studied in detail. Furthermore, a nonparametric test is proposed which is designed to test the hypothesis whether a NBU * t0 element is strictly new better than used after time t0.