SPC alarms
SPC Alarm abbreviations (n = SPC History Size)XCL - Last X-bar value not within control limits
RCL - Last Range value not within control limits
INC - Last 8 X-bar values were continuously increasing
DEC - Last 8 X-bar values were continuously decreasing
ABV - Last 8 X-bar values where above the mean.
BLW - Last 8 X-bar values were below the mean.
UTR - Last n X-bar values show an upward trend.
DTR - Last n X-bar values show a downward trend.
RSM - Within the last n X-bar values, a RUNSUM exceeded 4.