As the name implies, we make a deliberate decision to allow an equipment to operate until it fails — and the maintenance action occurs only after the failure has occurred. There are some limited cases where such a strategy makes common sense:
1. We can find no PM task that will do any good irrespective of how much money we might be able to spend.
2. The potential PM task that is available is too expensive. It is less costly to fix it when it fails, and there is no safety impact at issue in the RTF decision.
3. The equipment failure, should it occur, is too low on the priority list to warrant attention within the allocated PM budget.
4. Note the distinction between FF and RTF. With FF the failure is hidden and we do not want to be surprised by its occurrence if the failure should happen. With RTF, we have made a deliberate decision not to be concerned about failure occurrence, be it evident or hidden, and will simply correct the failure at our time of choosing should it occur.
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