Schladming "red" and "black" slopes for competitive skiers, and many "blue" slopes for beginners, but generally the Planai is an intermediate to expert mountain. The Hochwurzen is the other mountain in Schladming. It has three main red runs off the four-man chair lift and a sledge run. This mountain is better suited to more experienced boarders and skiers. Also, a 15-man cable car can take groups of up to five to the top. The surrounding mountains are popular with climbers and hikers and country lovers. In the summer, downhill toboggan runs and an outdoor swimming complex are open. The UCI Mountainbike
Expert for them to be accepted as an expert. In this respect, a shepherd with 50 years of experience tending flocks would be widely recognized as having complete expertise in the use and training of sheep dogs and the care of sheep. Another example from computer science is that an expert system may be taught by a human and thereafter considered an expert, often outperforming human beings at particular tasks. In law, an expert witness must be recognized by argument and authority. Research in this area attempts to understand the relation between expert knowledge, skills and personal characteristics and exceptional performance.