Fortunately, outright sabotage is rare these days (but it does happen). A more insidious source of equipment damage is unintentional sabotage through wrong operator practices. Sometimes, operator error is a glaringly obvious cause.
A new plant manager decided to “save money” on annealing furnace operations by replacing $12/hr trained operators with $6/hr entry level operators, since the job mostly involved sitting and watching. The furnace had run problem-free for years.