u Chart Template for Excel
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u Chart Template for Excel |
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Jay Arthur
We help people think! Copyright © 2008
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The purpose of the u chart template is to determine stability of "counted" data (e.g., errors per widget, inquiries per month, etc.) when the sample size varies and you can have more than one defect per unit. Here is an example of the u chart template in the QI Macros for Excel. Just type data into the yellow input area and the chart will be drawn to the right. You can also cut and paste data from another spreadsheet into the template.
The u chart template will help evaluate process stability when there can be more than one defect per unit. Examples might include: the number of defective elements on a circuit board, the number of defects in a dining experience--order wrong, food too cold, check wrong, or the number of defects in bank statement, invoice, or bill. The u chart template is especially useful when you want to know how many defects there are not just how many defective items there are. It's one thing to know how many defective circuit boards, meals, statements, invoices, or bills there are; it is another thing to know how many defects were found in these defective items. The u chart is used when the sample size varies: the number of circuit boards, meals, or bills delivered each day varies. The u chart template is just one of the tools included in the QI Macros for Excel SPC Software for Excel.
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