Nid yw’r system yn seiliedig ar ffigurau’n unig – caiff safon yr arweinyddiaeth, yr addysgu a'r dysgu yn ein hysgolion hefyd eu hystyried. Mae tri cham i’r system, fel a ganlyn:
The system is a three step model that is not purely data-driven but also takes into account the quality of leadership and teaching and learning in our schools: