[ZenGum]

We all know where 85% of problems come from.

In this case, it is lazy and dumb management. They want to make schools better. Good. Instead of getting to know each school and its specific challenges, they come up with a few statistical definitions which - for a perfectly normal school - probably do indicate quality (or lack of this). Then they apply that statistical definition across the board, without considering the special circumstances of each school. Things like this result.

Bad managers just want their decisions boiled down to comparing two numbers to see which one is higher. A great manager can see past that to the qualitative issues behind it. Great managers are very rare.