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Showing results for tags 'control charts'.
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Q 276. Nelson Rules - Generally, a process is said to be stable if none of the observations are outside the control limits. (Calculators for control limits can be seen at https://www.benchmarksixsigma.com/calculators/) However, Nelson rules could help us identify special causes even in such a seemingly stable process. What are these Nelson Rules? Highlight areas / processes where all tests as per Nelson Rules should be carried out. Note for website visitors - Two questions are asked every week on this platform. One on Tuesday and the other on Friday. All questions so f
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Control Charts vs Run Charts
Vishwadeep Khatri posted a question in We ask and you answer! The best answer wins.
Q. 191 Explain the four terms with respect to Run Charts - Mixtures, Clusters, Oscillations and Trends. Does a run chart provide any advantage as compared to a control chart? Note for website visitors - Two questions are asked every week on this platform. One on Tuesday and the other on Friday. All questions so far can be seen here - https://www.benchmarksixsigma.com/forum/lean-six-sigma-business-excellence-questions/ Please visit the forum home page at https://www.benchmarksixsigma.com/forum/ to respond to the latest question open till the next Tuesday/ Friday even -
Dear All, Please see below a query posted by a past participant. Please feel free to respond to this query. Regards, shantanu kumar --------------x--------------------------x-----------------------x--------------------------x--------------------------x---- Hi Shantanu, Hope you are doing well. I was trying to understand p-charts. Consider a case where in the output is varying and defectives are identified. Data for the same is as follows. When I tried to plot a p-chart for the same in Minitab, the UCL line varies as shown because of varying output, but a value of UCL (0.05439) is
