Residents need to learn many skills before performing safely and independent in the operating theater. Essential skills that are considered important for performing arthroscopy are anatomical knowledge, triangulation, and spatial perception. Sufficient metrics are available to monitor training performance. Motion, time, and force information can be combined in specific metrics that indicate instrument handling efficiency and risks on hazards during tissue handling. Translation of skills into measurable learning objectives is very well feasible for training skill-based behavior.@en