The study aims at analysis of surface roughness of AA6063 in CNC turning operation. In this paper an effective approach is made for the optimization of surface roughness using input parameters. The optimization process is done using RSM (Response surface methodology). This paper discusses the use of response surface methodology for minimizing the required surface roughness. Experiments were conducted based on the established RSM technique. The three machining parameters that are chosen as

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... s parameters are: Cutting speed, feed rate and depth of cut. Using design of experiments the Box-Behnken method is used in Response surface methodology to determine surface roughness.