Banding information invaluable for parents; WeSAY IN OUR OPINION.
As a marker of a school's performance - while also, importantly, taking into account factors such as free school meals take-up - it provides an invaluable source of information for mums and dads.
Yet, just as when the concept was first outlined, it has again been met with an angry response from teaching unions.
Some union leaders have branded the whole process "league tables by the back door".
But regardless of the rights or wrongs, it is something that has been - and should be - welcomed by parents.
As we report today one South Wales headteacher, despite having misgivings about the data, has spoken of the aim of improving the school's showing next year.
And that's where school banding comes into its own. It gives teachers, pupils, and even parents a tangible goal to aim for.
Without such data - as was the situation before banding was introduced - there is a risk that schools at the top of the pile can rest on their laurels, while those at the bottom of the heap feel doomed to fail.