Reliability theory

Reliability theory

Reliability theory developed apart from the mainstream of probability and statistics. It was originally a tool to help nineteenth century
maritime insurance and life insurance companies compute profitable rates to charge their customers. Even today, the terms "failure rate" and "hazard rate" are often used interchangeably.

The failure of mechanical devices such as ships, trains, and cars, is similar in many ways to the life or death of biological organisms. Statistical models appropriate for any of these topics are generically called "time-to-event" models. Death or failure is called an "event", and the goal is to project or forecast the rate of events for a given population or the probability of an event for an individual.

When reliability is considered from the perspective of the consumer of a technology or service, actual reliability measures may differ dramatically from perceived reliability. One bad experience can be magnified in the mind of the customer, inflating the perceived unreliability of the product. One plane crash where hundreds of passengers die will immediately instill fear in a large percentage of the flying consumer population, regardless of actual reliability data about the safety of air travel.

See also

* Actuarial science
* Availability
* Catastrophe modeling
* Extreme value theory
* Failure rate
* Fault tree
* Gompertz law
* Gompertz-Makeham law of mortality
* Reliability
* Reliability engineering
* Reliability theory of aging and longevity
* Survival analysis
* Weibull distribution

External links

* [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11742523&dopt=Abstract Reliability theory applied to aging and death]
* [http://www.eventhelix.com/RealtimeMantra/FaultHandling/reliability_availability_basics.htm Reliability and Availability Basics]
* [http://www.eventhelix.com/RealtimeMantra/FaultHandling/system_reliability_availability.htm System Reliability and Availability]
* [http://www.pixelbeat.org/docs/reliability_calculator/ Online Reliability calculator]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • reliability theory — patikimumo teorija statusas T sritis fizika atitikmenys: angl. reliability theory vok. Zuverlässigkeitstheorie, f rus. теория надёжности, f pranc. théorie de la fiabilité, f …   Fizikos terminų žodynas

  • Reliability theory of aging and longevity — is a scientific approach aimed to gain theoretical insights into mechanisms of biological aging and species survival patterns by applying a general theory of systems failure, known as reliability theory. OverviewReliability theory allows… …   Wikipedia

  • Reliability engineering — is an engineering field, that deals with the study of reliability: the ability of a system or component to perform its required functions under stated conditions for a specified period of time. [ Definition by IEEE] It is often reported in terms… …   Wikipedia

  • Reliability (statistics) — In statistics, reliability is the consistency of a set of measurements or measuring instrument, often used to describe a test. This can either be whether the measurements of the same instrument give or are likely to give the same measurement… …   Wikipedia

  • Reliability — In general, reliability (systemic def.) is the ability of a person or system to perform and maintain its functions in routine circumstances, as well as hostile or unexpected circumstances.The IEEE defines it as . . . the ability of a system or… …   Wikipedia

  • Reliability of Wikipedia — Vandalism of a Wikipedia article. The section on the left is the normal, undamaged version; and on the right is the edited, damaged version. The reliabili …   Wikipedia

  • Cultural consensus theory — supports a framework for the measurement and evaluation of beliefs as cultural; shared to some extent by a group of individuals. Cultural consensus models guide the aggregation of responses from individuals to estimate (1) the culturally… …   Wikipedia

  • Generalizability theory — (G Theory) is a statistical framework for conceptualizing, investigating, and designing reliable observations. It was originally introduced by Lee Cronbach and his colleagues. The G Theory compares with the Classical test theory (CTT) where the… …   Wikipedia

  • Fides (reliability) — Fides (latin: trust ) is a guide allowing estimated reliability calculation for electronic components and systems. The reliability prediction is generally expressed in FIT (number of failures for 109 hours) or MTBF (Mean Time Between Failure or… …   Wikipedia

  • Classical test theory — is a body of related psychometric theory that predict outcomes of psychological testing such as the difficulty of items or the ability of test takers. Generally speaking, the aim of classical test theory is to understand and improve the… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”