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Create a chart using a u Chart template: Open a template: QI Macros > Control Chart Templates > Attribute > u Chart; Input your data into the yellow shaded area. The chart is drawn as the data is input. Run stability analysis using the chart tools menu.
What is a u control chart? Learn the steps and equations in constructing a u control chart for defects in a given area.
Use a u chart to monitor process stability over time and monitor the effects of before and after process improvements. It is used when the sample size varies, such as the number of meals, bills delivered each day, etc. It computes control limits based on the Poisson distribution.
This template contains a pre-made control chart for sample Mean and Range, or sample Mean and Standard Deviation (2 worksheets in one). Just add your own data. Control limits are calculated based on the data you enter. - Evaluate process capability (Cp, CPU, CPL, Cpk, and % Yield) for given specification limits.
1. Select the data on the worksheet to be included in the analysis. You can use “Select Cells” in the “Utilities” panel of the SPC for Excel ribbon to quickly select the cells. 2. Select “Attribute” from the “Control Charts” panel on the SPC for Excel ribbon. 3. Select “u Chart” and then select “OK”.
The u chart, in particular, is a powerful tool for assessing the number of nonconforming items in a process over varying sample sizes. In this post, we'll explore the basics of u charts, how they work, and how to create one using a simple web application.
A U Chart is a type of attribute control chart used to control the mean number of defects in samples of differing sizes taken from a process. It is used when: Product characteristics can be evaluated with a discrete response: good/bad, pass/fail, or yes/no.
