ClassicModels Lecturer: Ngô Huy Biên nhbien@fit.hcmuns.edu.vn Waterfall Model The Waterfall Model is comprised of a series of very definite phases, each one run intended to be started sequentially only after the last has been completed, with one or more tangible deliverables produced at the end of each phase. Once you've completed a phase, its results are frozen. You can't go back and revise anything based on changing needs or fresh insights. Until the results of the current phase are complete and approved, you may not start on any work that properly belongs to the next phase or any later phase. Limit risk to an affordable sum Minimize effort spent on unproductive or undesired directions Avoid the possibility of losing control of a project NASA/SEL Sashimi, Waterfall with Subprojects Waterfall with Risk-reduction Prototype Model Spiral Model V-Model Thank you for your time . Classic Models Lecturer: Ngô Huy Biên nhbien@fit.hcmuns.edu.vn Waterfall Model The Waterfall Model is