on 03-30-2009 8:08 PM
Hello,
1) Is it required to specify (a static value) for the SampleSize parameter (Default size - 100) for an attribute chart? or could this value be specified through a query?
2) Could someone provide some illustrative (sample data) for plotting a "p" chart in MII (the fraction of all defective units per total units in the sample).
Appreciate any ideas
Thanks.
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Rick,
A related question in the P-chart-
As you suggested, we specified a Column from our query results for the "Sample size Column" for the P-chart.
This worked and the P-chart was plotted. The points and the Centerline (P) are displayed correctly as expected. However the Control limit lines (UCL, LCL) are not getting displayed !!
I was also suprised to note that these limits (LCL, UCL, CL) are actually getting calculated (when I rightclick -> Data --> SPCResults --->Upper Chart Data Points, they show here).
However these are not calculated (and shown as 'NA'??) when I right click -> Data --> Summary Statistics.
I have enabled the "Calculate Control Limits" and :Show Upper Control Limits"
Am I missing something?
Appreciate any ideas.. Thanks!
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