Hospitals are the focus of the fight against SARS-CoV-2 pandemic. To meet this challenge hospitals need a Disaster Response Plan and a Hospital Incident Command System (HICS) as a crisis leadership tool. The complex dependency between the systems staff, supplies, and space during the SARS-CoV-2 pandemic is a major problem for hospitals. To take the appropriate countermeasures, the effects of the crisis on these systems must be detected, analyzed, and displayed. The presentation and interpretation of such complex processes often poses serious problems for the hospitals' incident commanders. In this article, we describe a new model that is able to display these complex interrelationships within the command process. The model was developed and deployed during the disaster response to SARS-CoV-2 pandemic in order to facilitate the entire command process and to improve hospital disaster response. The approach of the model is as simple as it is innovative. It perfectly symbolizes the basic principle of disaster medicine: keep is safe and simple. It will help hospitals to improve command and control and to optimize the disaster response during SARS-CoV-2 pandemic.