The next step is to divide each of the figures we've just calculated by 3 sigma units (3s) for the process. This figure was calculated previously, and used in the control limit calculations for the X graph. The value has been entered into the appropriate boxes below.
Complete the calculations for the two possible Cpk values and enter your answers in the boxes outlined in red. Your answers should be rounded to 2 decimal places. When you have finished, click the button to check your answers.