Mobile machines are investment goods used by many different parties: Manufacturers and owners, hire companies and operators, project managers and insurers. All of these have a common interest: to use the machines as efficiently as possible. One aspect of many for efficient use, albeit an extremely important and fundamental one, is to achieve as continuous and fault-free an operation as possible, because every standstill is associated with frequently enormous costs. However, without maintenance, faults and therefore machine breakdowns are certain to occur.