Outage Management System (OMS) is a valuable and necessary support system that helps repair teams restore power as quickly and efficiently as possible. An OMS requires an accurate and complete connectivity model, from the distribution substation breaker right down to the customer transformer. It is characterized by a graphical user interface (GUI) that can display from one to several feeders at the same time. It provides the capability to efficiently collect, identify, and resolve outages, and generate and report valuable historical information. It is capable of receiving anywhere from a single call to a very large volumes of calls, which it analyzes and groups together to form something that is easier to handle. An OMS can also display large call volumes in a geographic display in real-time, while at the same time providing the same information simultaneously to a large number of utility employees.