Final answer:
Facilities with over 1000 sprinklers require a certain number of spare parts to be available, based on factors like the complexity of the system and the probability of failure. A risk assessment should be conducted to determine the optimal number of spares to have on hand.
Step-by-step explanation:
Facilities with over 1000 sprinklers require a certain number of spare parts to be available. The exact number of spares needed depends on several factors such as the complexity of the sprinkler system, the probability of failure, and the expected time for repairs. A thorough analysis and risk assessment should be conducted to determine the optimal number of spare parts to have on hand.