Difference between Surface Roughness and Waviness (metrology)

Surface Roughness	Waviness
It is also called Primary Texture	It is also called Secondary Texture
It consists of Micro Symmetrical Irregularities	It consists of Macro Symmetrical Irregularities
It is produced by action of cutting tool	It is produced due to Vibrations
Irregular Surface have small wave length	Irregular Surface have larger wave length
It have low ratio of length(h) along surface	It have High ratio of length(h) along surface