Understanding Grading

Grading ranks have 9 potential outcomes (A1, A2, A3, B1, B2, B3, C1, C2, C3), with A1 being the best score and C3 being the worst score. The A, B, C portion of the grade relates to the width of the bell curve compared to the specification limits. The 1, 2, 3 portion of the grade relates to how well the process is centred on the target. A grade of A1 means that the process is "tight and centred." A C3 grade indicates a process with undesirable variation and not targeted very well.

To learn about metrics across sites, please see Metrics Across Multiple Sites.