The Free On-line Dictionary of Computing (30 December 2018):

Systems Development Life Cycle

    (SDLC, or "Software...") Any logical process used by
   a systems analyst to develop or redesign an information
   system.  SDLC includes requirements, design, development,
   integration, testing, validation, training, user ownership,
   operations, analysis and maintenance.

   An SDLC should result in a system that meets or exceeds customer
   expectations, within time and cost estimates, works effectively
   and efficiently in the current and planned Information
   Technology infrastructure, is cheap to maintain and
   cost-effective to enhance.

   (http://www.sdlc.ws/what-is-sdlc/).

   US DOJ SDLC
   (http://www.justice.gov/jmd/irm/lifecycle/table.htm).

   (2013-11-12)