A tradeoff B-X life and its applications

作者：Jiang, R.^*

来源：Reliability Engineering & System Safety, 2013, 113: 1-6.

DOI：10.1016/j.ress.2012.12.010

• B-X life
• Cycle reliability
• Useful life
• Quality index
• Reliability design
• Component selection

A product usually consists of multiple components. Product design needs to specify the life limit of each component. The life limit can be viewed as a preventive replacement age and expressed as a B-X life. A large value of X means low cycle reliability but small life loss. As such, X must be appropriately specified so that a good tradeoff between reliability and life can be achieved. This paper presents an approach to determine the value of X for a component with a known life distribution. The approach divides the expected useful life into two parts. One part is from the items failed before B-X and the other part is from the items replaced preventively at B-X. There exists a unique B-X, which makes the latter part achieve its maximum. This B-X life can achieve a good tradeoff between reliability and life, and hence is termed as tradeoff B-X life. The potential applications of the tradeoff B-X life are discussed, and the tradeoff B-X lives for the Weibull, gamma and lognormal distributions are derived. A real-world example is included to illustrate the appropriateness and usefulness of the results.

• 出版日期2013-5
• 单位长沙理工大学