Control Chart for Mean and Range
[Title or Process]Quality Characteristic
Average Thickness (mm), X-bar
Sample Size, n
5k
3
Statistics from Data Table
Process Capability
R-bar
4.360Upper Spec Limit, USL 40Process Mean, m -hat 34.840Lower Spec Limit, LSL
30Process St.Dev., s -hat
1.874p
s X-bar
0.838
CPU 0.918CPL 0.861C pk
0.861Percent Yield
99.21%
Control Limits for X-bar Chart
Control Limits for R Chart
CL X-bar 34.840
CL R 4.360UCL X-bar 37.355CL+k s X-bar UCL R 9.219LCL X-bar
32.325CL-k s
X-bar LCL R
0.000
a 0.0027
ARL
370.4samples
[Date]