Development in the field of materials brings numerous newer grades, but the machinability studies over those materials have to be done. Drilling is the major manufacturing process which covers around 25% of machining processes. Magnesium AZ31 is considered for the present investigation to perform the drilling operation. Control over the responses like circularity, perpendicularity and cylindricity will improve the life of fastening element due the reduction of compressive and shear stress. The deviation of above responses will increase compressive and shear stress leads to fatigue and also increases the assembling time. This work concentrates on the reduction of such distinctive properties. Empirical model was developed to find the responses for the usage of process planning engineer, later optimization carried out through Desirability Function Approach (DFA). The multi objective optimization suggesting the spindle speed of 1100.02 rpm, the feed rate of 0.038 mm/rev. and the drill diameter of 6 mm for minimizing all the responses considered. Similarly Grey Relational Analysis (GRA) applied to reduce the responses. Evaluation made between DFA and GRA which highlights the superiority of GRA for circularity and cylindricity. The DFA be the superior technique for minimizing the perpendicularity.

材料领域的发展带来了许多较新的等级，但是必须对这些材料进行可加工性研究。钻孔是主要的制造过程，约占加工过程的25％。本研究考虑使用镁AZ31进行钻孔操作。控制圆度，垂直度和圆柱度之类的响应，将减少压缩应力和剪切应力，从而提高紧固元件的寿命。上述响应的偏差会增加压缩应力和剪切应力，导致疲劳，并且还会增加组装时间。这项工作集中于减少这种独特的特性。开发了经验模型以找到对过程计划工程师的使用的响应，后来通过合意函数法（DFA）进行了优化。多目标优化建议主轴转速为1100.02 rpm，进给速度为0.038 mm / rev。钻头直径为6毫米，以最大程度地减少所有考虑的响应。同样，应用灰色关联分析（GRA）来减少响应。在DFA和GRA之间进行的评估突出了GRA在圆度和圆柱度方面的优势。DFA是使垂直度最小化的卓越技术。在DFA和GRA之间进行的评估突出了GRA在圆度和圆柱度方面的优势。DFA是使垂直度最小化的卓越技术。在DFA和GRA之间进行的评估突出了GRA在圆度和圆柱度方面的优势。DFA是使垂直度最小化的卓越技术。