Page 360 - Six Sigma Demystified

340 Six SigMa DemystifieD

Figure F.38 Example of target, competitor, and importance scores.

(3 × 9) + (4 × 3) + (4 × 3) + (4 × 0) + (3 × 3) + (3 × 3) + (2 × 1) = 71

The importance of the other operational requirements is calculated similarly.
They are rank-ordered, with the largest being the highest priority. In this exam-
ple, cook training was the most important operational requirement, followed
by wait staff training. You can use the importance as input to the target value:
The most important requirements might be best targeted at or better than the
competitors’ values, as shown in the example.

Interpretation

If there are no hows (or a weak relationship of hows) for a given what, then
there’s an opportunity for improvement, although it may be that subsequent
matrices (part, process, or operational) will address this what.
Hows unrelated to any whats are candidates for removal as non-value-added
activities. We should check the customer requirements to ensure that they are
accurate and complete and verify this against the competitor analysis.

r&r Studies

Gauge repeatability and reproducibility (R&R) analysis quantifies the error
owing to a measurement system.