For managers, the rule is: intervene as little as possible, but as much as necessary in a conflict involving their own employees. As a starting point, it is important to also recognize hidden conflicts and assess their severity. The theoretical basis for this is provided by Friedrich Glasl's model of the nine stages of conflict escalation. It clearly shows how conflicts can escalate if timely intervention is neglected. For each escalation stage, managers therefore learn various methods of conflict resolution - from the promotion of independent conflict resolution to mediation and arbitration as well as to the intervention of power.