--- title: "Meaning & Key Takeaway of: The key utility measure is user…" description: "\"“The key utility measure is user happiness. Speed of response and the size of the index are factors in user happiness. It seems reasonable to assume th..." image: "https://sms4smile.com/quotes/i/f7a/christopher-d-manning-83754_2008_the-key-utility-measure-is-user-happines_433077.jpg" --- # The key utility measure is user happiness. Speed of… ![“The key utility measure is user happiness. Speed of response and the size of the index are factors in user happiness. It seems reasonable to assume that relevance of results is the most important factor: blindingly fast, useless answers do not make a user happy. However, user perceptions do not…” quote by Christopher D. Manning](https://sms4smile.com/quotes/i/f7a/christopher-d-manning-83754_2008_the-key-utility-measure-is-user-happines_433077.jpg) [Download](https://sms4smile.com/quotes/i/f7a/christopher-d-manning-83754_2008_the-key-utility-measure-is-user-happines_433077.jpg) [Open image](https://sms4smile.com/quotes/i/f7a/christopher-d-manning-83754_2008_the-key-utility-measure-is-user-happines_433077.jpg) > ““The key utility measure is user happiness. Speed of response and the size of the index are factors in user happiness. It seems reasonable to assume that relevance of results is the most important factor: blindingly fast, useless answers do not make a user happy. However, user perceptions do not always coincide with system designers' notions of quality. For example, user happiness commonly depends very strongly on user interface design issues, including the layout, clarity, and responsiveness of the user interface, which are independent of the quality of the results returned.”” [Christopher D. Manning](https://sms4smile.com/quotes/author/christopher-d-manning/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. User happiness is the primary metric for search utility; speed, relevance, and UI design affect satisfaction more than raw result quality. **In simple terms:** User satisfaction depends on speed, relevance, and design. Key Takeaway Prioritize user experience over pure algorithmic metrics. Themes usability design relevance Mood analytical pragmatic Type technical practical When to use this quote - product design - search engine development - UX testing - customer support Key Concepts Human‑computer interaction information retrieval Questions to Reflect On - How can UI design improve perceived relevance? - What balance between speed and answer depth satisfies users? A Different Perspective Technical improvements alone may not boost happiness without UI enhancements. ★ ★ ★ ★ ★ No ratings yet [2008](https://sms4smile.com/quotes/about/zz-2008-580/) [Design](https://sms4smile.com/quotes/about/design/) [Happiness](https://sms4smile.com/quotes/about/happiness/) [Happiness Speed](https://sms4smile.com/quotes/about/happiness-speed-3813228/) [Information-retrieval](https://sms4smile.com/quotes/about/information-retrieval-91303/) [Responsiveness User](https://sms4smile.com/quotes/about/responsiveness-user-3813226/) [Search engine](https://sms4smile.com/quotes/about/search-engine/) [User Happiness](https://sms4smile.com/quotes/about/user-happiness-3813224/) [User interface](https://sms4smile.com/quotes/about/user-interface/) [User Perceptions](https://sms4smile.com/quotes/about/user-perceptions-3813225/) [Utility Measure](https://sms4smile.com/quotes/about/utility-measure-3813227/) ## Related quotes > [Utility then is not the measure of exchangeable value, although it is absolutely essential to it.](https://sms4smile.com/quotes/david-ricardo/utility-then-is-not-the-measure-of-exchangeable-value-although-it-is/) [David Ricardo](https://sms4smile.com/quotes/author/david-ricardo/) > [“Thus, an index built for vector space retrieval cannot, in general, be used for phrase queries. Moreover, there is no way of demanding a…](https://sms4smile.com/quotes/prabhakar-raghavan/thus-an-index-built-for-vector-space-retrieval-cannot-in-general-be/) [Prabhakar Raghavan](https://sms4smile.com/quotes/author/prabhakar-raghavan/) ## More by Christopher D. Manning > [“With limited training data, a more constrained model tends to perform better.”](https://sms4smile.com/quotes/christopher-d-manning/with-limited-training-data-a-more-constrained-model-tends-to-perform/) [Christopher d. manning](https://sms4smile.com/quotes/author/christopher-d-manning/) > [“In principle, more analytic power can be achieved by varying multiple things at once in an uncorrelated (random) way, and doing standard analysis, such…](https://sms4smile.com/quotes/christopher-d-manning/in-principle-more-analytic-power-can-be-achieved-by-varying-multiple/) [Christopher D. Manning](https://sms4smile.com/quotes/author/christopher-d-manning/) [Explore all 3 Christopher D. 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Bush as treating the…](https://sms4smile.com/quotes/christopher-hitchens/mrs-clinton-speaking-to-a-black-church-audience-on-martin-luther-king/) [Christopher Hitchens](https://sms4smile.com/quotes/author/christopher-hitchens/) > [“Hillary Clinton is as qualified or more qualified than I am to be vice president of the United States of America. Quite frankly, it…](https://sms4smile.com/quotes/joe-biden/hillary-clinton-is-as-qualified-or-more-qualified-than-i-am-to-be/) [Joe Biden](https://sms4smile.com/quotes/author/joe-biden/) > [“Here the query A320 returns algorithmic search results about the Airbus aircraft, together with advertisements for various non-aircraft goods numbered A320 that advertisers seek…](https://sms4smile.com/quotes/hinrich-sch-tze/here-the-query-a320-returns-algorithmic-search-results-about-the/) [Hinrich Schütze](https://sms4smile.com/quotes/author/hinrich-sch-tze/) > [“Stand up, Chuck, let 'em see ya.”](https://sms4smile.com/quotes/joe-biden/stand-up-chuck-let-em-see-ya/) [Joe Biden](https://sms4smile.com/quotes/author/joe-biden/) > [“Because of the "city upon a hill" sound bite, " A Model of Christian Charity " is one of the formative documents outlining the…](https://sms4smile.com/quotes/sarah-vowell/because-of-the-city-upon-a-hill-sound-bite-a-model-of-christian/) [Sarah Vowell](https://sms4smile.com/quotes/author/sarah-vowell/) > [“Drilling without thinking has of course been Republican party policy since May 2008. 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