"[...] the characteristic of an information infrastructure to store and retrieve information in an accessible, secure, maintainable, and fast manner." (Martin J Eppler, "Managing Information Quality 2nd Ed.", 2006)
"The measure of robustness over time. The length of time a product or process performs as intended." (Lynne Hambleton, "Treasure Chest of Six Sigma Growth Methods, Tools, and Best Practices", 2007)
"Reliability describes a product’s ability to maintain its defined functions under defined conditions for a specified period of time." (Lars Dittmann et al, "Automotive SPICE in Practice", 2008)
"A stochastic measure of the likelihood that a system will be able to deliver a service." (Bruce P Douglass, "Real-Time Agility: The Harmony/ESW Method for Real-Time and Embedded Systems Development", 2009)
"The degree to which the new system is perceived as being better than the system it replaces, often expressed in the economic or social status terms that will result from its adoption." (Linda Volonino & Efraim Turban, "Information Technology for Management" 8th Ed, 2011)
"The ability for a component (server, application, database, etc.) or group of components to consistently perform its functions." (Craig S Mullins, "Database Administration", 2012)
"A set of characteristics relating to the ability of the software product to perform its required functions under stated conditions for a specified period of time or for a specified number of operations." (Tilo Linz et al, "Software Testing Foundations" 4th Ed, 2014)
"It is a characteristic of an item (component or system), expressed by the probability that the item (component/system) will perform its required function under given conditions for a stated time interval." (Harish Garg, "Predicting Uncertain Behavior and Performance Analysis of the Pulping System in a Paper Industry using PSO and Fuzzy Methodology", 2014)
"A characteristic of an item (component or system), expressed by the probability that the item (component/system) will perform its required function under given conditions for a stated time interval." (Harish Garg, "A Hybrid GA-GSA Algorithm for Optimizing the Performance of an Industrial System by Utilizing Uncertain Data", 2015)
"A sub-set of statistical engineering methodology that predicts performance of a product over its intended life cycle and understanding of the effects of various failure modes on system performance." (Atila Ertas, "Transdisciplinary Engineering Design Process", 2018)
"The ability of the software product to perform its required functions under stated conditions for a specified period of time, or for a specified number of operations" (ISO 9126)
"The ability of the software product to perform its required functions under stated conditions for a specified period of time, or for a specified number of operations." (ISO/IEC 25000)
"The capability of a system or component to perform its required functions under stated conditions for a specified period of time." (IEEE Std 610.12-1990)
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