Six Sima Project Report 04 - Improve Phase.ppt

公司名稱 / 專案負責人名 /檔名 /專案編號 # /結案日期 Pg * Y = F(X) 與 R(adj)-sq : Y(NTF%)=2.1514+1.185*House using times+0.9*Memory convert card using times+0.351*House using times* Memory convert card using times R-Sq = 84.01% 目前製程能力 : (Zst) 1.09 Sigma 預期專案改善績效(Zst) : 3.0 Sigma 最佳解決對策與改善計畫: settle production parameter as : a. CPU convert house using times = 1750 times b. Memory convert card using times = 2200 times c. Operator shift = any one R4 Improve Summary 階段開始日期: 06/16/2005 階段完成日期: 08/15/2005 專案類型 : DMAIC Conclusion / Issues / Next Step : To do the DOE with all possible factor after A phase, and then confirm which is key factor to impact NTF rate. 2. Based on Interaction Plot Main Effect Plot DOE analysis, we have got a result that CPU convert house and memory convert card using times will impact NTF rate. 3. In other words, NTF rate have 84.01% variability come from CPU convert house and memory convert card using times . 4 . Based on Regression result, we know that:Y(NTF%)=2.1514+1.185*House using times+0.9*Memory convert card using times+0.351*House using times* Memory convert card using times 5. Based on DOE analysis, we have got a result that CPU convert house and memory convert card using times will impact NTF rate. But consider material cost, we will be settle production parameter as : a. CPU convert house using times = 1750 times b. Memory convert card using times = 2200 times c. Operator shift = any one This parameter is same as adjust current, so we will need modify using times SPEC 6.Inspect sample 6400pcs, find P-value=0.000 0.05, Accept Ha, It is said that NTF rate less than 1.4% is viable after adjusting parameter. 變異的來源(X’s): X1 : CPU convert house using times, X2 : Memory convert card using times X3 : operator shift 專案名稱 :提升 F2 test yield rate:5% 組別 : Gpro002 I2-1 DOE 實驗規劃 Pg * 1. Problem Statement : NTF fail yield is high 2. Objective : We need to improve F/T yield rate from 93% to 98