The Capability Plot is located in the lower right corner of the Capability Sixpack - Between/Within.

The capability plot consists of three intervals:

·    The between/within interval represents the potential process tolerance and is calculated by six times the B/W (between and within) standard deviation. The interval is centered at the process mean.

·    The overall interval represents the actual process tolerance and is calculated by six times the overall standard deviation. The interval is centered at the process mean.

·    The specification interval represents the interval between the lower and upper specification limits (LSL and USL).

Compare the B/W and overall intervals to the specification interval. For a capable process, the B/W and overall intervals should be narrower than the specification interval and centered at the target or center of the specifications.

For the coating data, the B/W and overall intervals are contained within the specification interval, implying that at least 99.74% of the measurements are within the specification interval.