No. 99MBG518A
G-44
PART G : 4 Results
4.2.4 X-R Graph
The X-R graph consists of the two graphs, average value (X) and range (R). X-R graph is active only
when the group measurement is enabled.
X graph indicates changes to the average value of a group and the R graph indicates changes to the
dispersion in a group.
This graph determines whether an error has occurred in the process based on the center line (CL),
upper control limit (UCL), and the lower control limit (LCL).
No. Name Details
①
X graph Plots the transition of the hardness value for each measurement
group (average hardness value of a measurement group) for each
specimen.
②
Vertical axis maximum Displays the maximum value for the vertical axis.
③
Vertical axis minimum Displays the minimum value for the vertical axis.
④
Horizontal axis value Displays the number of data points.
⑤
R graph Plots the transition of the dispersion for hardness value for each
specimen.
⑥
UCL (X graph) Displays the upper control limit on the X graph. The group size
should be two or more.
UCL = X + A
2
R
This is displayed as a red dotted line in the X graph.
⑦
CL (X graph) Displays the center line of the X graph.
CL = X
This is displayed as a solid red line in the X graph.
⑧
LCL (X graph) Displays the lower control limit on the X graph. The group size
should be two or more.
LCL = X – A
2
R
This is displayed as a yellow dotted line in the X graph.
⑨
UCL (R graph) Displays the upper control limit on the R graph. The group size
should be two or more.
UCL = D
4
R
This is displayed as a red dotted line in the R graph.
⑩
CL (R graph) Displays the center line of the R graph.
CL = R
This is displayed as a solid red line in the R graph.
To Next Page
Loading...
