Name each type of person involved in each phase of SDLC and condense the seven phases of SDLC to five.  Discuss the risks?

UML
https://en.wikipedia.org/wiki/Unified_Modeling_Language
http://www.agilemodeling.com/essays/umlDiagrams.htm

Agile
http://en.wikipedia.org/wiki/Systems_development_life-cycle
http://en.wikipedia.org/wiki/Joint_application_design
http://en.wikipedia.org/wiki/Agile_software_development
http://en.wikipedia.org/wiki/XP_programming
https://en.wikipedia.org/wiki/Technical_debt

Cheers!