Modern power distribution networks assume the connection of Distributed Generators(DGs) and energy storage systems as well as the application of advanced demand managementtechniques. After a network fault these technologies and techniques can contribute individually tothe supply restoration of the interrupted areas and help improve the network reliability. However,the optimal coordination of control actions between these resources will lead to their most efficientuse, maximizing the network reliability improvement. Until now, the effect of such networks withoptimal coordination has not been considered in reliability studies. In this paper, DGs, energy storageand demand management techniques are jointly modelled and evaluated for reliability assessment.A novel methodology is proposed for the calculation of the reliability indices. It evaluates the optimalcoordination of energy storage and demand management in order to reduce the energy-not-suppliedduring outages. The formulation proposed for the calculation of the reliability indices (includingthe modelling of optimal coordination) is described in detail. The methodology is applied to twodistribution systems combining DGs, energy storage and demand management. Results demonstratethe capability of the proposed method to assess the reliability of such type of networks and emphasisethe impact of the optimal coordination on reliability.