German organisations give the technically competent function authority over how its work is done, and the phrase das ist Sache der Fachabteilung — that is the specialist department’s affair — settles a question by naming who owns it.
The work breakdown
Der Projektstrukturplan. The work breakdown structure. A German project is decomposed into work packages, each with an owner, a deliverable, a duration and a number. The plan is not a list of tasks. It is a structure, and the numbering shows how each piece hangs off the whole.