Wire electrical discharge machining (WEDM) is most suited for machining conductive materials when precision is required. There are a large number of input control parameters that govern the WEDM performance. Thus, it becomes essential to optimize process control parameters to achieve optimal results. In the present paper process parameter optimization using Taguchi quality design concept of L16 orthogonal array for the wire-cut electrical discharge machining of D2 steel is done. Four process control parameters, namely wire speed, gap voltage, flushing pressure, and current, are analyzed for two response parameters viz surface roughness and material removal rate (MRR). It is found that MRR during WEDM have a predominant impact of current on it, while flushing pressure has the least impact on MRR. Whereas, surface roughness is most effected by wire speed during WEDM and gap voltage has the least impact on surface roughness of D2 steel workpiece during WEDM process.