Stage/toll-gate model

(Advanced structural framework) A model where continuous toll-gates are performed, meaning continuously checking the quality of work performed in order to identify adjustments needed. Because of this, it is practically more realistic than the waterfall model. Certain sub-goals are created within production. When the necessary work of the first one has been completed, a toll-gate is performed. If the work is sufficiently good, the group moves forward to the next subgoal.