Distribution power systems can be very complex, integrating many different types of components; circuit breakers, fuses, cables, overhead lines, transformers and auxiliaries which are used to provide electricity to a number of consumers with
varying requirements. Each individual component has its own characteristics, including its reliability. The power supply reliability will be measured, monitored, evaluated by using some number of performance matrices, mainly for: i) frequency of outages (SAIFI, ASIFI) and ii) duration of outages (SAIDI, ASIDI, and CAIDI). These matrices are based on
sustained outages. Sustained interruptions are those that last more than five minutes [1]. This paper presents and analyzes the statistical performance matrices for the previous 10 years for the distribution system in Egypt and how it can be used to help electricity Distribution Companies (EDCs) to improve the reliability of their networks' electric components.