September 2017

Abstract: The only commonly used control chart that cannot be normalized is the Individuals (I) chart.  A procedure called a Normalized Individuals (IN) chart is provided for normalizing data associated with an I chart.  The IN chart works nearly identical to the Laney U’ and P’ charts for count data.  The IN chart has certain theoretical advantages as

Abstract: P charts are used for count data following the Binomial distribution.  However, the P chart has symmetrical control limits when the Binomial distribution is nonsymmetrical.  As a result, the upper control limit can have a rate of false detection as high as 1 in 11.5 points plotted.  This can result in wasted resources investigating