Quality control scheme with learning effect consideration

This work identifies a link between quality control scheme and the learning effect caused by the quality improvement program. The reduction rate of process standard deviation may be large during the initial stage of the quality improvement program, and influences the construction of control chart. Simulation is used to evaluate the performance of the control charts. The EWMA mean control chart with consideration of learning curve performs best. The Shewhart mean control chart without learning curve consideration has almost no detection ability when the shift magnitude of the process mean is small.