As shown in Table 2, based exclusively on the data for 60 embedded defect assessments, a
standard vertical sizing error of 0.7 mm was found. For the surface-breaking flaws on the cap or
root, the 50 AUT and DT flaw assessments produced a standard vertical sizing error of 0.3 mm.
The safety limit against undersizing, defined as Equation 2, was also calculated. (Nordtest, 1998)