Diben cynnwys amrywiaeth ehangach, fwy soffistigedig o ffactorau yw deall y math o gymorth sydd ei angen ar ysgol a rhoi darlun gwell i rieni o sut mae ysgol yn perfformio.
The purpose of including a broader and more sophisticated range of factors is to understand the kind of support needed by a school and to give parents a better picture of how a school is performing.