Operations Management: Sustainability and Supply Chain Management, Twelfth Edition

Summary

Statistical process control is a major statistical tool of quality control. Control charts for SPC help operations managers distinguish between natural and assignable variations. The $\overline{x}$-chart and the R-chart are used for variable sampling, and the p-chart and the c-chart for attribute sampling. The C_pk index is a way to express process capability. Operating characteristic (OC) curves facilitate acceptance sampling and provide the manager with tools to evaluate the quality of a production run or shipment.

Key Terms

• Statistical process control (SPC) (p. 246)

• Control chart (p. 246)

• Natural variations (p. 246)

• Assignable variation (p. 247)

• $\overline{x}$-chart (p. 248)

• R-chart (p. 248)

• Central limit theorem (p. 248)

• p-chart (p. 255)

• c-chart (p. 257 ...