Six Sigma: SPC and TQM in Manufacturing and Services

Book excerpt: ’Six Sigma’ is a quality concept initially used by Motorola and then developed beyond manufacturing by GE Capital. It has underpinned that organisation's phenomenal success. In essence it is a way of scientifically measuring your current success (or failure) rate in relation to customer expectations (regardless of industry sector) and then ensuring that improvements are made. Six Sigma is the application of a new model of working, statistical measurement and process control to TQM. The ’normal’ position of businesses today is three sigma (or a defect rate of about 5-10%); six sigma - a defect rate of less than four in every million - is the ultimate goal. This book explains the concept of Six Sigma and its statistical basis; explains the benefits which can be achieved by using it in any company and then outlines how to implement such a programme.