In the step plan, every piece of information belongs to a level. Planning permission belongs to the subdivision, an execution plan to the block or building project, an energy certificate or notarial deed to the home of one buyer.
In Lean, those three levels form one structure. A document is recorded once and is visible where it is needed. Per process you see how many documents have come in and which are still missing, and through the file's planning also when they are needed.