Reducing and managing the leaks and identifying the most appropriate strategy could be seen as the most fundamental problem for water administrations. The aim of this study is to discuss the importance of DMA for the management, reduction and control of water losses based on the system components and to evaluate the advantages of the DMA and the expected benefits. The answer to the question of "Why is DMA necessary in water management?" has been investigated based on the results emphasized from the literature studies and the field application. It may be emphasized that DMA could be an important tool in terms of accurate and sustainable measurement of data required for monitoring the system performance. It could be said that DMA is necessary to provide customer management, to recognize, detect the unreported leaks, to determine the most appropriate pressure management and to define the most appropriate strategy in water management.