![]() ![]() Thus, the preference order of the alternatives can be derived from a series of comparisons of these relative distances. The Euclidean distance approach was proposed to evaluate the relative closeness of the alternatives to the ideal solution. Therefore, it is easy to define the positive ideal and negative-ideal solutions. ![]() The TOPSIS method assumes that each criterion has a tendency of monotonically increasing or decreasing utility. The basic concept of this method is that the selected alternative should have the shortest distance from the ideal solution and the farthest distance from the negative-ideal solution in any geometrical sense. Multi-criterion decision making method, TOPSIS has been employed for …show more content… It was developed by Hwang and Yoon in 1980. The Roughness characteristics of Arithmetic average (Ra), Geometric average (or) RMS value (Rq) and Ten point height average (Rz) were considered as the experimental responses. ![]() For the experimentation, twenty seven alternatives of EDM process parameters, Pulse on time (TON), Pulse off time (TOFF), Wire Tension (WT) and Wire Feed (WF) were considered as per the Taguchi’s standard L27 Orthogonal Array. The present work is to explore the effect of EDM process parameters on the surface roughness characteristics Ra, Rq and Rz. Show More Simultaneous Optimization of Arithmetic Average Roughness (Ra), Geometric Average Roughness (Rq) and Ten Point Height Average Roughness (Rz) Using TOPSIS ![]()
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