Statistical Process Control (SPC)

Associate
Joined
27 Jul 2005
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555
Is anyone familiar with this?

I have an assignment to do and one of the questions has 4 charts and i have got to determine which (if any) of the charts is within control,

They are flow charts, can someone tell me what factors determine whether or not which of them is in control?

Does it have anything to do with the percentage of dots which are within the ULC, and the LLC?
pretty stuck!

Thanks!¬
 
You'll need to give me more data if you want help. Are these X-bar and R charts or what?
 
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