The emergency care and primary out of hours care in the Netherlands is under pressure. There is a rising demand from patients for acute care at the primary out of hours service (run by General Practitioners) as well as for the emergency departments (EDs) at the hospitals. The workload for healthcare professionals in these acute care setting is high. Without changes in the organization of primary out of hours care and emergency care, the quality, accessibility and efficiency of the acute care can't be guaranteed in the future.