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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 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 evening 5 PM as per Indian Standard Time. Questions launched on Tuesdays are open till Friday and questions launched on Friday are open till Tuesday. The best answer is always shown at the top among responses and the author finds honorable mention in our Business Excellence dictionary at https://www.benchmarksixsigma.com/forum/business-excellence-dictionary-glossary/ along with the related term
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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 evening as per Indian Standard Time. The best answer is always shown at the top among responses and the author finds honorable mention in our Business Excellence dictionary at https://www.benchmarksixsigma.com/forum/business-excellence-dictionary-glossary/ along with the related term. -
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 highlighted; Similarly for LCL (0.00675). How is this figure arrived at? Defective Volume 15 500 20 528 13 465 12 470 Warm Regards, Krishnan S
