Senior[[Kent programmer, Ward Cunningham,Beck]] developed extreme programming and Kent Beck [a junior programmer under Cunningham] went on to revise XP during his work on the [[Chrysler Comprehensive Compensation System]] (C3) payroll [[project]].<ref name=Cworld92/> Beck became the C3 [[Project management|project leader]] in March 1996. He began to refine the development methodology used in the project and wrote a book on the methodology (''Extreme Programming Explained'', published in October 1999).<ref name="Cworld92">[http://www.computerworld.com/article/2585634/app-development/extreme-programming.html Computerworld-appdev-92 "Extreme Programming", ''Computerworld'' (online), December 2001].
</ref> [[Chrysler]] cancelled the C3 project in February 2000, after seven years, when [[Daimler-Benz]] acquired the company.<ref name="SR">{{cite book | last1 = Rosenberg | first1 = Doug | last2 = Stephens | first2 = Matt | title = Extreme Programming Refactored: The Case Against XP | year = 2003 | publisher = Apress | isbn = 978-1-59059-096-6 | url-access = registration | url = https://archive.org/details/extremeprogrammi00matt }}</ref> [[Ward Cunningham]] was another major influence on XP.
