Many German construction contracts include the standard terms known as VOB/B. Section 5 sets the deadlines for the work. It gives the client the right to demand more effort from the contractor in one case. Wenn Arbeitskräfte, Geräte, Gerüste, Stoffe oder Bauteile so unzureichend sind, dass die Ausführungsfristen offenbar nicht eingehalten werden können, muss der Auftragnehmer auf Verlangen unverzüglich Abhilfe schaffen. If workers, equipment, scaffolding, materials or components are so insufficient that the deadlines obviously cannot be met, the contractor must remedy this without delay on request. The condition is in the word offenbar, obviously.