Statistical process control

S.P.C. "Properly applied, S.P.C. is virtually foolproof. It is simple to use, involves little or no complicated mathematics, and almost guarantees to pay for itself in saved effort." (Wilson) Definition Outputs from a manufacturing process will vary - perhaps minutely - from the exact specification, and deliveries from a service will differ in quality and substance. These inconsistencies in quality require constant monitoring to see if they are random, regular, haphazard, …

…method used is vital. ·Fix the blame once you've solved the problem - fix the process. Reference Statistical process control textbook, 4th ed, John S Oakland Oxford: Butterworth Heinemann, 1999 SPC essentials and productivity improvement: a manufacturing approach, William A Levinson and Frank Tumbelty Milwaukee Wisconsin: ASQC Quality Press, 1997 Measuring process capability : techniques and calculations for quality and manufacturing engineers, Davis R Bothe New York: McGraw Hill, 1997 SPC and business improvement, Mal Owen Bedford: IFS Publications, 1993