The evaluation will therefore seek to explore the factors underpinning the reported lack of consistency in the interpretation of the definitions and the implications of this across the system.
Felly, bydd y gwerthusiad yn ceisio archwilio'r ffactorau sy'n sail i'r diffyg cysondeb a adroddwyd wrth ddehongli'r diffiniadau a goblygiadau hyn ar draws y system.