Gain insights by using control charts to analyse your performance test results

On Friday 16 May 1924 Walter Shewhart gave his manager at Bell Telephone Laboratories a memo.  The memo “suggested a way of using statistics to improve quality in telephones.[1]” Shewhart’s memo proposed using Statistical Process Control, including Control Charts for visualisation, to improve quality. Shewhart sparked “a revolution in quality control”[2] that can help us …

A quality costs scorecard

Juran’s Quality Control Handbook is a reference book for people who “are involved with” quality. The 4th Edition of the handbook includes an article by Frank M. Gryna about Quality Costs. Gryna says that as companies began to extend the concept of identifying costs to quality they found that costs relating to quality were much …

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