1 23 Journal of Materials Engineering and Performance ISSN 1059-9495 Volume 20 Number 7 J. of Materi Eng and Perform (2011) 20:1121-1127 DOI 10.1007/s11665-010-9754-6 Modeling of Electrical Discharge Machining Process Using Conventional Regression Analysis and Genetic Algorithms Kuntal Maji & Dilip Kumar Pratihar