Editing Project management software (section)

===Emergence of the term "project management" and modernized techniques===
The term ''[[project management]]'' was not used prior to 1954 when [[United States Air Force|US Air Force]] General [[Bernard Adolph Schriever]] introduced it for military purposes. In the years to follow, project management gained relevance in the business world — a trend that had a lot to do with the formation of the [[AACE International|American Association of Engineers]] AACE (1956), and Rang and DuPont's Critical Path Method, which has been used to calculate project duration ever since 1957.<ref>[http://www.aacei.org/aboutUs/ "About UsAACE International: The Authority for Total Cost Management"], ''aacei.org'',</ref>

The trend is also related to the appearance of the [[Program evaluation and review technique|Program Evaluation Review Technique]] (PERT) in 1958. PERT advanced project monitoring, enabling users to simultaneously monitor tasks, evaluate their quality, and estimate the time needed to accomplish each of them. Like [[Gantt chart]]s and CPM, PERT was invented for military purposes, this time for the US Navy Polaris missile submarine program.<ref>[http://www.referenceforbusiness.com/encyclopedia/Per-Pro/Program-Evaluation-and-Review-Technique-PERT.html "PROGRAM EVALUATION AND REVIEW TECHNIQUE (PERT)"], ''referenceforbusiness.com'',</ref>

In 1965, there was a new improvement in project management technology. The [[United States Department of Defense|US Department of Defense]] presented the [[work breakdown structure]] (WBS) to dissolve projects into even smaller visual units, organizing them in a hierarchical tree structure. WBS was an inspiration for [[Winston W. Royce|Winston Royce]]’s Waterfall Method (1970) where management phases are organized in a way that doesn’t allow a new task to begin before the previous ones are completed.<ref>[http://www.dau.mil/pubscats/pubscats/pm/articles02/lit-ma2.pdf "“Breaking Down” The Work Breakdown Structure"] {{webarchive|url=https://web.archive.org/web/20161221132113/http://www.dau.mil/pubscats/PubsCats/PM/articles02/lit-ma2.pdf |date=2016-12-21 }}, ''dau.mil'',</ref>