>

W-profile (waviness profile) is the mean line generated from the P-profile by the profile S-filter with the nesting index Nic (previously cut-off λc). It does not include the large-scale components which must be attributed to the form.

Total height Wt (= total height of the W-profile) is the sum of the largest peak height and the largest pit depth of the W-profile within the evaluation length le.