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Former Member
Oct 27, 2008 at 06:37 AM

How to generate control limits in control chart

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I want to generate a X bar chart with control limits, sample size is Fix- 1.

SPC criterion I selected is 020 ie Task List characteristics/ Material.

1)Sampling Procedure I used- Fixed-1

2)Valuation mode I used- Attrib non conforming units/ manual.

3)Control chart I am using is 110- Shewart chart for X bar.

But when I click for control limits in chart it is saying control limits for track 1 could not be calculated.

Could anyone guide me, how to generate control limits for this graph. Sammple size will alwyas be 1.

Please let me know should I change control chart type in this case.