Donald Wheeler has over forty years of experience in the study, practice and collaboration in data analysis. In “Twenty Things You Need to Know”, he shares this experience in the form of questions and answers. What are two mistakes in data analysis? Mistake one: “Interpreting the routine variation of noise as if it amounted to …
Tag Archives: SPC
“The Purpose of Analysis is Insight”
Testers want to analyse the product and process to improve quality. Once every engineering team had a statistician, that is not the case today. Testers can help their team by using statistics, such as control charts, to do analysis. There are a lot of resources to help us use statistics, for example, this blog post …
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 …
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A review of “Understanding Variation The Key to Managing Chaos” by Donald J. Wheeler
This book is both insightful and useful. It was recommended to me by members of the Deming Profound Book Club. Wheeler describes how to create control charts and analyse processes using control charts. This book can help you start to use control charts to analyse data from your test and development processes. Walter Shewhart invented …
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