Many of our surfaces have symmetric peaks and valleys that follow a normal or bell-shaped height distribution. But often we want a surface that is skewed toward the peaks or valleys. The Rsk parameter, which is widely used to report the direction and degree of this skewness, has some serious issues baked into the math which can have you chasing process issues that aren’t really there. In this video we examine the Rsk parameter how it is calculated, and why there be more stable options for production measurement.