Data for SPC

1

2

3

4

exercise

5.510.03

5.490.04

5.520.03

5.510.03

5.500.02

5.480.03

5.480.04

5.500.04

5.500.03

5.470.03

5.480.03

5.500.02

5.500.02

5.490.04

5.510.03

5.510.03

5.500.03

5.510.04

5.490.03

5.500.03

5.510.03

5.500.04

5.500.04

5.490.04

5.500.02

5.530.02

5.520.03

5.520.01

5.490.04

5.490.04 Step

计算X bar和R

计算X barbar和R bar

计算控制线

消除失控点或改善能力

Xbar chart R chart UCL=Xbarbar +A2*Rbar Ucl=D4*Rbar LCL=Xbarbar -A2*Rbar Lcl=D3*Rbar

X Chart R Chart

Ucl X bar Lcl Ucl R Chart Lsl