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.
Encyclopedia > Persistence of vision. Persistence of vision. Persistence of vision is the theory that the perceptual processes of the brain or the retina of the human eye retains an image for a split second. This accounts for the fact that when a motion picture flashes a series of progressive images, instead of the mind seeing the flashing of a series of images, it sees the illusion of motion. Persistence of vision should be compared with the related phi phenomenon.