Pitfalls and Practical Considerations in Product Life Analysis—Part I: Basic Concepts and Dangers of Extrapolation
作者:
HahnGerald J.,
MeekerWilliam Q.,
期刊:
Journal of Quality Technology
(Taylor Available online 1982)
卷期:
Volume 14,
issue 3
页码: 144-152
ISSN:0022-4065
年代: 1982
DOI:10.1080/00224065.1982.11978807
出版商: Taylor&Francis
关键词: Censored Data;Extrapolation;Failure Data;Life Testing;Reliability;Weibull Distribution
数据来源: Taylor
摘要:
Important decisions are frequently made from the analysis of product life and field data using various graphical and analytical methods. Simple methods, such as fitting a Weibull distribution to the data, however, may give wrong answers, especially when estimates beyond the data range are desired, under certain conditions. The first part of this paper reviews the major purposes of product life analyses, briefly describes some of the standard methods and indicates some pitfalls associated with the use of simple methods. The hazards are illustrated by the analysis of human mortality and electromechanical device data. The second part of the paper discusses pitfalls resulting from product mixtures, proposes some general models for product life analysis and suggests remedial approaches.
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