M
mmcbhd
I am using standarized P chart for short run production, do I need to remove the "out-of-control" point after investigation and recalculate Z value?
Or do I keep all data points, but recalcuate P bar value (to get latest Z value) whenever there are failures?
Or do I keep all data points, but recalcuate P bar value (to get latest Z value) whenever there are failures?