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Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 16 May 2000 16:38:27 +0800 |
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Hi,
I believe that all of you must have some ideas on the term "Normal
Distribution".
What I am now facing is a population from batch of power supply output
voltage. Since some power supplies had failed in meeting the customer
specification at their initial measurement, output were then adjusted
by tuning the trim-pot in the power supplies. After that, I measured
the output voltage of all the power supplies then drew the
distribution graph. You can see that the distribution is now clipped
at both ends. Does anyone knows how this kind of distribution called?
And, if I cannot use the formula for a normal distribution to
calculate the cpk , what can I use to measure the process capability
under this condition?
Besides, does anyone know something about "Bimodal Distribution" and
how is it defined?
Comments are welcome.
Best Regards,
Charles
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