Mae tri cham i astudiaeth yr Oriel Celf Gyfoes Genedlaethol, ac mae'n fodel y gellir ei ddatblygu mewn nifer o wahanol ffyrdd, gan ddibynnu ar adnoddau.
There are three phases to the National Contemporary Art Gallery study, and is a model that can be developed and taken forward in a number of different ways depending upon resources: