Dr Juergen Ude
21 March 2019
The objective of this article is to show problems with Shewhart charts and to compare these with Manhattan control charts.
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Mr Christopher Ude
The following is about a 62-year-old heart patient, whom was alerted to dangerously high blood pressure (despite taking BP medication) using Change Analysis, and how these insights were used in conjunction with the assistance of his doctor to identify a medication in-efficiency.
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Dr Juergen Ude
Shewhart charts were first introduced by Dr. Walter Shewhart early this century. Their logic is extremely simple. There is a natural amount of variation in measurements, which we should not react to other than through major process changes.
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Dr Juergen Ude
There are many schools of thoughts on the best application of control charts. The general opinion is that the control chart is a tool for continuous improvement, whereby assignable causes are identified and removed.
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Dr Juergen Ude
If the quality profession wants others to improve, then it too must seek to improve. Unfortunately there seems to be no sign of improvement in quality technology.
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Dr Juergen Ude
It may seem hard to understand why Manhattan Control was forgotten, why statisticians and consultants have not promoted them. I believe that the reasons are simple. When Manhattan Control was first introduced, personal computers were not available....
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Dr Juergen Ude
Historically process control has been performed with the Shewhart Control chart, such as the Individuals chart. Shewhart control charts are often hailed as the most important quality improvement tool.
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Mr Christopher Ude
The following is about a 55-year-old diabetic, Patient X, who successfully brought her blood glucose back to a state-of-control through lifestyle changes, using change analysis as her tool of insight.
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Dr Juergen Ude
Change Analysis is used to detect changes in chronological ordered data. Using machine power algorithms, combined with statistical significance testing, changes in the process average, standard deviation and slopes can be rapidly detected.
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