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Employees can be seriously injured and killed by hazardous machine movement during routine maintenance or repairs. The majority of these injuries can be prevented by immobilizing equipment and machinery using the following methods. Lockout/tagout, this method disconnects equipment from power sources, physically locks power switches or breakers in the off position and identifies the person responsible for the lock, indicates the date and describes the work being done. Blocking, this physically immobilizes equipment parts with pins, locks, and blocks. And managing keys, this limits access to ignition and start keys while repair and maintenance is taking place.