German conflict training often uses the nine stages of escalation described by Friedrich Glasl. They fall into three levels. In the first, both sides can still win. In the second, one wins and the other loses. In the third, both lose. The last stage is called Gemeinsam in den Abgrund, together into the abyss.
A training handout on violence in medical practices, on the website of the national association of statutory health insurance physicians, lists the nine stages. It quotes the first rule of a state accident insurer: Wehret den Anfängen! Stop it at the start. A regional sports federation teaches club officials that at the second stage, eine sachliche (!) Auseinandersetzung, a factual discussion, could still end the conflict.