Machinability is the term associated with easy cutting action,in which a metal can be machined, permitting the material removal with the desired surface finish at a lower cost. Working material with good machinability means the unwanted material can be removed quicklyagainst relatively small consumed power with reasonably good surface finish against low tool wear rate—various engineering materials having different machinability under the specific condition of machining. Variation of factors for determining machinability of the particular material, like cutting force, power consumption, tool life rating, surface integrity, limiting rate of material removal, tool geometry with the material and stability of the machine tool. Thus, machinability is a relative term associated with many factors.In order to compare the relative machinability, the term machinability index needs to consider. However, the machinability of advancedmachining processes like Electric Discharge Machining (EDM) or Powder Mixed Electric Discharge Machining (PMEDM) is not exactly the same as the conventional machining process. The machinability of EDM or PMEDM depends on its degree of complexity and many factors. At the same time, three essential attributes of EDM machinability arematerial removal rate (MRR), tool wear rate(TWR)and the surface roughness(SR) of the machined part. So, the machinability of EDM or PMEDM has beenan interesting area of research in recent days. In the last decades, various researchers have focused their studies on PMEDM for its different advantages. The objective of the present work is to review multipletypes of research. In addition, to highlight and summarize the research works in a systematic order and hence, to find out the future scopes in this particular field. It will motivate the researchers for exploring their study in the considered arena

EDM, Dielectric fluid, spark gap, electrode, PMEDM, WEDM