6 Sigma and CTQ(3)

Quality

6 Sigma / CTQ六西格玛: 目标 Six Sigma: GoalSigma 2σ 3σ 4σ 5σ 6σ dpmo 308,538 66,000 6,210 233 3 Defect Rate 缺陷率 1 in 3 1 in 15 1 in 160 1 in 4,300 1 in 300,00010,000Xdpmo: defects per million opportunities每百万次中的缺陷数56 Sigma / CTQ为什么要推行六西格玛Why Six Sigma?DPMO(Defects Per Million Error Opportunities一般公司baggage handling: 3.5 sigma行李传送业界标杆)Cp 0.67 Cpk 0.17 1.0 0.5 1.33 0.83 1.67 1.17 2.0 1.5国内航班6