There must be an escalation model for deviations within the project which threaten the overall timing plan (risk management). An escalation process for the project is described & established. It takes account of specific customer requirements.
The criteria for escalation are specified and responsibilities & authorities are regulated. The effectiveness of the function (escalation) is demonstrated by appropriate documentation.
If special risks have been identified for technologies, suppliers and supply countries, this must also be taken into account in escalation management.