We think it's misleading to insist that, when schools are rich in data, quality decision-making will follow. However, an abundance of data is no crystal ball. To make quality decisions, there are principles to be followed, starting by the first question: what is the decision to be made, and why must it be made? The second question deals with the nature of the decision (e.g., is it the only decision of its kind, ever? Highly unlikely.). How one responds to those questions determines the subsequent actions. Among the subsequent actions is likely analysing the data that the school has to-hand.