Editing Critical chain project management (section)

== Origins ==
Critical chain project management is based on methods and algorithms derived from [[Theory of Constraints]].  The idea of CCPM was introduced in 1997 in Eliyahu M. Goldratt's book, [[Critical Chain (novel)|''Critical Chain'']].  The application of CCPM has been credited with achieving projects 10% to 50% faster and/or cheaper than the traditional methods (i.e., CPM, PERT, [[Gantt chart|Gantt]], etc.) developed from 1910 to 1950s.<ref>{{Cite web|url=https://www.pmi.org/learning/library/critical-chain-pm-improves-performance-5305|title=Critical Chain Project Management Improves Project Performance|website=www.pmi.org|language=en|access-date=2017-01-27}}</ref>

According to studies of traditional project management methods by Standish Group and others as of 1998, only 44% of projects typically finish on time. Projects typically complete at 222% of the duration originally planned, 189% of the original budgeted cost, 70% of projects fall short of their planned [[Scope (project management)|scope]] (technical content delivered), and 30% are cancelled before completion.<ref>{{Cite web|url=https://www.projectsmart.co.uk/white-papers/chaos-report.pdf|title=The Standish Group Report Chaos|website=www.projectsmart.co.uk|language=en|access-date=2017-07-20}}</ref> CCPM tries to improve performance relative to these traditional statistics.