Rz

Average Maximum Height of the Profile, is the average of the successive values of Rti calculated over the evaluation length. This parameter is the same as Rz(DIN) when there are five sampling lengths within the evaluation length.
The Rz definition is identical to the definition in DIN 4768:1990. The ten point height Rz as well as the parameter symbol Ry of ISO 4287:1984 have been canceled