Experienced operators don't just know what to do — they know what to watch, regardless of how conditions change. That ability hinges on perceptual invariants: the critical relationships and variables that remain meaningful even as everything else shifts. Human factors engineer Dave Strobhar explains how identifying and reinforcing these invariants is the key to effective operator training. Rather than relying on years of trial and error, structured training programs — including targeted simulator use — can accelerate expertise dramatically. The goal is moving operators from simple stimulus-response behavior to true skill-based thinking that transfers across novel situations, closing the experience gap faster than ever before.