Planning, executing, Collecting data on a continuous basis from a solution in order to determine how well a solution is implemented compared to expected results. See also metric; indicator., and controlling any or all of the work associated with requirements Iterative derivation and extraction of information from stakeholders or other sources. and The act of two or more people working together towards a common goal., requirements analysis and A usable representation of a solution. For more information see Key Terms (p. 14) and Requirements and Designs (p. 19)., and The stages through which a requirement progresses from inception to retirement. management.