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The distribution system links the complicated structure of the transmission system to the individual customers. The existing power system is smart, twofold, active, interconnected, interdependent, load-sharing, and phased-mission systems [12]. Subsequently, to showcase all these features efficiently it has undergone many modifications in its structure, such as:

 Incorporation of new protection devices

 Inclusion of distributed generators in the systems

 Reactive power compensating devices

 Capacitor bank requirements

Inclusion of all such foreign structures may affect the reliability of the system. Reliability of a power system is commonly defined as a measure of the ability of the system to provide the product to the customers with a passable stream. It is considered to be one of the most important performance criteria of the power sector, which includes the planning, performance, and maintenance of electric power systems [13]. Reliability engineering is a subdiscipline of systems engineering that focuses on the ability of system components to function without failure. It enhances the system output by reducing the failure rate of the system. It describes the ability of a utility to function under defined criteria for a quantified period of time. Reliability and quality are the two faces of the coin so need to be paid due attention. It is a well-known fact that is commonly discussed that the probable cause of almost 90% of failures that occur in the distribution systems are due to reliability issues. Thus the first work was oriented to reliability indices, defined as objectives to attempt to improve performance measures in the electricity market. Overviewing all these concerns of updating the qualitative and quantitative output of the distribution system by considering the importance of new technologies, its effective and fruitful implementation, revealed that reliability aspects and energy sustainability are two principal issues of evolvement in any society [14].