Experienced manufacturing engineers often hold knowledge that never makes it into work instructions, such as which stations fall behind and why, and that knowledge can leave with them. Training new engineers gets squeezed out by production emergencies, so newcomers piece together how a plant works slowly and inefficiently. Continuous camera-based measurement of production activity can give engineers a searchable history of cycle times, waiting, and shift differences, so they can ask sharper questions and spend less time gathering basic observations. That frees experienced engineers to focus on the judgment-heavy problems and on teaching the next generation. This is why the engineer who knows everything has no time to explain It.