Machine parts are greatly influenced by the surface quality during their useful life and productivity also plays an important role in the existence of any product in market. In order to achieve that, process parameters should be suitably regulated.The paper shows a review about the optimization of various parameters of milling operations such as cutting speed, feed, depth of cut, vibration, materials and materials sizes.Paper shows minimum surface roughness, minimum time and minimum cutting force , can be obtained by using several optimization techniques.