SDLC Waterfall
Seven phases of the systems‐development life cycle methodology
The SDLC methodology is sometimes referred to as the waterfall
methodology to represent how each step is a separate part of the
process; only when one step is completed can another step begin. After
each step, an organization must decide whether to move to the next step
or not. This methodology has been criticized for being quite rigid. For
example, changes to the requirements are not allowed once the process
has begun. No software is available until after the programming phase.
Again, SDLC was developed for large, structured projects. Projects using
SDLC can sometimes take months or years to complete. Because of its
inflexibility and the availability of new programming techniques and tools,
many other software‐development methodologies have been developed.
Many of these retain some of the underlying concepts of SDLC, but are
not as rigid.
