Timeline that collections data point "Account Weighted Average Days Outstanding" takes into account?

Summary:

The client is looking to implement Oracle Advanced Collections Cloud and are looking at the average past due date to assess the risk level of their customers.

The predefined collections data point "Account Weighted Average Days Outstanding" comes closes to this.

To explain the differences to the client accurately, what is the timeline that the collections data point "Account Weighted Average Days Outstanding" takes into account for calculating the result?