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A Gantt chart is a type of bar chart, adapted by Karol Adamiecki in 1896 and independently by Henry Gantt in the 1910s,〔Weaver, Patrick (April 4–6, 2006). ("A Brief History of Scheduling." ) Mosaic Project Services Pty Ltd.〕 that illustrates a project schedule. Gantt charts illustrate the start and finish dates of the terminal elements and summary elements of a project. Terminal elements and summary elements comprise the work breakdown structure of the project. Modern Gantt charts also show the dependency (i.e., precedence network) relationships between activities. Gantt charts can be used to show current schedule status using percent-complete shadings and a vertical "TODAY" line as shown here. Although now regarded as a common charting technique, Gantt charts were considered revolutionary when first introduced. This chart is also used in information technology to represent data that have been collected. ==Historical development== The first known tool of this type was developed in 1896 by Karol Adamiecki, who called it a ''harmonogram''. Adamiecki did not publish his chart until 1931, however, and only in Polish, which limited both its adoption and recognition of his authorship. The chart is named after Henry Gantt (1861–1919), who designed his chart around the years 1910–1915.〔H.L. Gantt, ''Work, Wages and Profit'', published by the ''Engineering Magazine'', New York, 1910; republished as ''Work, Wages and Profits'', Easton, Pennsylvania, Hive Publishing Company, 1974, ISBN 0-87960-048-9.〕〔Peter W. G. Morris, ''The Management of Projects'', Thomas Telford, 1994, ISBN 0-7277-2593-9, (Google Print, p.18 )〕 One of the first major applications of Gantt charts was by the United States during World War I, at the instigation of General William Crozier.〔Wallace Clark and Henry Gantt (1922) ''(The Gantt chart, a working tool of management )''. New York, Ronald Press.〕 In the 1980s, personal computers allowed for widespread creation of complex and elaborate Gantt charts. The first desktop applications were intended mainly for project managers and project schedulers. With the advent of the Internet and increased collaboration over networks at the end of the 1990s, Gantt charts became a common feature of web-based applications, including collaborative groupware. 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「Gantt chart」の詳細全文を読む スポンサード リンク
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