The traditional approach to IT is to wait until something breaks and then get it fixed.
This has worked for a long time but if you think about it, how much sense does it really make? Would you drive your car until the wheels feel off? Would you drive without an oil change until the engine seized? NO!! That would cost a lot more in the long run then getting the oil changed when you need it, not to mention the inconvenience of all that downtime to fix the car.