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One of the most important factors that adversely affect quality of turning process is flank-wear. The flank-wear influences surface roughness and dimensional accuracy of finished product. Both flank-wear and surface roughness depend upon machining parameters and geometry of cutting tool inserts. Therefore, in order to ensure minimum flank-wear and surface roughness, it is necessary to optimise these machining and geometrical parameters in turning process. In the present work, seven parameters — cutting speed [m/minute], feed rate [mm/rev], depth of cut [mm], material type (hardness value HB), cutting-insert-shape, relief angle [°] and nose radius [mm] — were selected. Experimental layout using Taguchi’s L ₁₈ orthogonal array was employed. Flank-wear and surface roughness were minimised using Taguchi’s signal-to-noise ratio concept with lower-the-better quality characteristic. Experimental results …