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'''Shift-left''' testing refers to testing software early in the [[Software development|development]] process, while [https://www.dynatrace.com/news/blog/what-is-shift-left-and-what-is-shift-right/ shift-right] testing refers to testing towards the end of the development cycle. The term, "shift-left" is used to describe the idea of moving [[software testing]] earlier in the process, which [https://www.softwaretestinghelp.com/shift-left-testing-approach/ can help catch defects earlier and reduce the cost of fixing them later]. In contrast, "shift-right" refers to testing later in the process, which can help ensure that the software meets the intended requirements and functions correctly before it is released. SHift -left is also the first half of the maxim "test early and often"<ref>{{cite web|url=https://msdn.microsoft.com/en-us/library/vstudio/ee330950%28v=vs.110%29.aspx |title=Test Early and Often |author=Microsoft | date=2012 |access-date=27 March 2015}}</ref>, coined by Larry Smith in 2001.<ref>{{Cite journal|last=Smith|first=Larry|date=September 2001|title=Shift-Left Testing|url=https://www.drdobbs.com/shift-left-testing/184404768|journal=Dr. Dobb's Journal|volume=26|number=9|pages=56, 62}}</ref><ref>{{Cite web|url=http://collaboration.cmc.ec.gc.ca/science/rpn/biblio/ddj/Website/articles/DDJ/2001/0109/0109e/0109e.htm|archive-url=https://web.archive.org/web/20140810171940/http://collaboration.cmc.ec.gc.ca/science/rpn/biblio/ddj/Website/articles/DDJ/2001/0109/0109e/0109e.htm|url-status=dead|archive-date=2014-08-10|title=Sep01: Shift-Left Testing|date=2014-08-10|access-date=2019-09-06}}</ref>
== Why Shift Left Testing ? ==
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