Dyfarniad wedi'i seilio ar ddata yw cam un sy'n defnyddio set o fesuriadau perfformiad cymeradwy a ddarparwyd gan Lywodraeth Cymru.Yng ngham dau, mae'r ysgolion yn hunanwerthuso eu capasiti i wella mewn perthynas ag arweinyddiaeth ac addysgu a dysgu.Yng ngham tri, caiff y ddau ddyfarniad eu hystyried ar y cyd i rannu'r ysgolion yn gategorïau lliw. Bydd hyn yn arwain at raglen o gefnogaeth, her ac ymyrraeth a fydd wedi'i theilwra'n benodol ar gyfer pob ysgol. Bydd angen i'r awdurdod lleol a'r consortiwm addysg rhanbarthol gytuno ar hyn.
Step one is a data-driven judgement using an agreed set of performance measures provided by the Welsh Government.Step two begins with the school’s own self-evaluation of their capacity to improve in relation to leadership, teaching and learning.Step three is the combination of the two judgements that will lead to a colour-coded support category for the school which will trigger a tailored programme of support, challenge and intervention. This is agreed between the local authority and regional education consortium.