SSM is system status management. This was developed by Jack Stout as an integral part of his Public Utility Model of Ambulance Service. In a nutshell, SSM is based on the idea that historical data from the past 12 weeks will be predictive of where ambulance calls will happen next. Ambulances are "posted" in these areas, as determined by software and frequently moved as the prediction for service changes.what is SSM?
Also see: sitting in parking lots.