Trying to understand surface texture using just a parameter or two is like trying to drive at night using only your speedometer and a compass. Those tools can tell you which direction you’re headed, and how fast…but they can’t help you to correct. In this video we describe the profile graph and dive into what it can tell us about our surfaces and processes. Rather than “dead reckoning” using parameters, the profile graph helps relate the shape of your surface to what’s happening in your process.