Cam Un: dyfarniad ynghylch perfformiad ysgol, a'r safonau yn yr ysgol, gan ddefnyddio ystod o fesurau perfformiad a ddarperir gan Lywodraeth Cymru;Cam Dau: dyfarniad ynghylch gallu ysgol i wella ei hunan, yn seiliedig ar hunanwerthuso cadarn mewn perthynas â'r arweinyddiaeth, y dysgu a'r addysgu;Cam Tri: cyfuniad o'r ddau ddyfarniad yn arwain at ddosbarthu ysgol i gategori lliw, wedi'i gadarnhau gan Gynghorwyr Herio o’r consortia addysg ac fel a gytunwyd gan yr awdurdod lleol.
Step One: a judgement in relation to performance and standards in the school, using a range of performance measures provided by Welsh Government;Step Two: a judgement in relation to the school’s ability to self-improve, based on robust self-evaluation in relation to leadership, learning and teaching; andStep Three: combination of the two judgements leading to a colour Categorisation, corroborated by education consortia Challenge Advisers and agreed by the local authority.