📏 Process Capability and Control Charts: Cpk, X-bar and R Charts, Drift (2D)

Live measurements of a robotically machined bore plotted against its tolerance limits, with X-bar and range control charts, the histogram against the normal curve and the process capability indices. Set the subgroup size, the process spread, a mean shift and a slow tool-wear drift, and see Cp, Cpk, the parts per million out of tolerance, the chart signals and the average run length of the chart. Chart constants, capability, run length and range statistics are checked numerically, with four in-page numerical checks.