This research aims to reduce scrap brass material. In the process Wire Cut CNC and to improve the problems solved Which such problems arising from the use of sheet brass objects when cutting will be left เศษที่ not in use To leave quite a lot is caused by placing Layout cutting caused by loss of cost waste For this reason the researcher has studied the problem to improve, reduce scrap materials แผ่นทองเหลือง to a minimum Moreover, the statistics used in the design process the experiment to reduce the time spent in the cut By applying experimental design Taguchi (Taguchi Design) control the variables used The improvement to reduce scrap materials in the process of sheet brass Wire CUT CNC can reduce scrap brass sheet remaining from the cut can be reduced 13.1 percent Of the total area, and can increase the number of the target is 4 times from the cut once Also can reduce the time spent cut from the original thinking is 1 target, reduce the time 0.52 minutes is จำนวนเงิน that can reduce the cost, think as 1 workpiece Reduce 2.82 baht..