In the present manufacturing scenario, EDM is the widely used non-traditional machining process which is used to machine hard materials such as alloys or composites. In the last few decades, there are lots of advancements in EDM which makes EDM more popular. There is a wide range of application of EDM in the aerospace, die-making and some other manufacturing sectors which require high precision. EDM is also called as high precision machining which can be used in the batch production where the traditional machining processes fail. In the last few years the developments in the new tool material, optimization techniques, and conductive ceramics have made some new research scopes in EDM. The aim of present study is to investigate the effect of input parameters like current, voltage and pulse-on-time on the Al-SiC (reinforced with 10% wt. of SiC). The output parameters for the process are MRR, TWR and surface roughness. It is found that the selection of input parameters plays an important role in the performance of the EDM.