The Normal tool in Capability Analysis fits a normal distribution to the data before calculating its capability. The sixpack in the previous recipe provides an overview page with control charts, whereas here, we focus on using just the capability histogram. We obtain a more detailed capability metrics output compared to the sixpack without the control charts or distribution plot.
Just like the previous recipe, we will use the study on the fill volume of syringes. The target fill volume is 15 ml with specifications of 14.25 ml and 15.75 ml.
Within the worksheet, 40 results are collected per day at the rate of five samples per hour. The data is presented as subgroups across rows, each row representing the results of the five samples within that hour.
We will generate a capability analysis and add confidence limits to the capability calculations.