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Apdex (Application Performance Index) is an open standard developed by an alliance of companies. It defines a standard method for reporting and comparing the performance of software applications in computing. Its purpose is to convert measurements into insights about user satisfaction, by specifying a uniform way to analyze and report on the degree to which measured performance meets user expectations. ==Problem addressed== When engaging in application performance management, for example in the course of Website monitoring, enterprises collect many measurements of the performance of information technology (IT) applications. However, this measurement data rarely provides a clear and simple picture of how well those applications are performing from a business point of view, a characteristic desired in metrics that are used as key performance indicators. Reducing measurement data to a single well understood metric is the ideal way to track and report on Quality of experience. Reporting several different kinds of data often confuses the picture, rather than clarifying it. Measurements of application response times, in particular, can be obtained from many different measurement tools, yet once gathered, they are difficult to evaluate because: * Viewed alone, they do not reveal whether people using the application consider its behavior to be highly responsive for their particular needs, merely tolerable, or frustratingly slow. * Using averages to summarize many measurement samples washes out important details in the measurement distribution, and may obscure evidence that many users may have been frustrated with application response times that were significantly slower than the average value. * The objectives (or ''goals'' or ''targets'') set for response time values are not uniform across different applications. This makes it difficult to view comparable data for several applications side-by-side (such as in a digital dashboard), and see quickly which are meeting their objectives and which are not. The Apdex method seeks to address these problems. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Apdex」の詳細全文を読む スポンサード リンク
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