Structured analysis uses the SDLC to plan and manage the systems development process. The SDLC describes activities and functions that all systems developers perform, regardless of which
approach they use. In the waterfall model, the result of each phase is called a
deliverable, or end product, which flows into the next phase Some analysts see a disadvantage
in the built-in structure of the SDLC, because the waterfall model does not
emphasize interactivity among the phases. This criticism can be valid if the SDLC
phases are followed too rigidly. However, adjacent phases usually interact, as shown