What is a Phase Review Process. A Phase Review process, also referred to as a Stage-GateÂ® process, is a project management technique, in which an initiative or project (e.g. product development, process improvement, business change, etc.) is divided into phases (or stages) separated by tollgates.
Definition of persistence for English Language Learners. : 1  the quality that allows someone to continue doing something or trying to do something even though it is difficult or opposed by other people. : 2  the state of occurring or existing beyond the usual, expected, or normal time.
adjective. 1  Refusing to give up or let go; persevering obstinately. 2  Insistently repetitive or continuous: a persistent honking of car horns. 3  Existing or remaining in the same state for an indefinitely long time; enduring: persistent rumors; a persistent infection. Botany Lasting past maturity without falling off, as the calyx on an eggplant or the scales of a pine cone. Zoology Retained permanently, rather than disappearing in an early stage of development: the persistent gills of fishes.