Trying to Create an np Chart in Excel?
Create a np Chart by running QI Macros:
- Select your data.
- Click on QI Macros menu > Control Charts (SPC) > Attribute (c,np,p,u,g,t) > np.
- QI Macros will do the math and draw the chart for you.
- QI Macros will also turn any unstable points or conditions red.
Use np Charts when counting defective items / constant sample size
The np Chart is useful when it's easy to count the number of defective items and the sample size is always the same. Examples might include: the number of defective circuit boards per 1000 or incorrect invoices per each sample of 50.
Example of np Chart data
Example of an np Chart created using QI Macros
It's Easy to Draw an np Chart in Excel Using QI Macros
QI Macros adds a new menu to Excel and provides two ways to create charts - macros and templates:
Run a Macro on
Watch an np Chart created with our macro:
Input Data into a
Example of QI Macros np Chart template:
I looked at a number of alternatives (some much more expensive than QI Macros, some in the same price range); QI Macros was head and shoulders above the competition in price/performance.
- Robert Bamford
Software Systems Quality Consulting
Stop Struggling with np Charts!
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