Proske, DirkDirkProskeTschan, DavidDavidTschan2024-11-192024-11-192021-05-12978-3-030-73615-610.1007/978-3-030-73616-3_20https://arbor.bfh.ch/handle/arbor/43529deTATGDiscussion of the Number of Risk Classesfor Risk Based Maintenance-book_section