When you take your car into the shop, the mechanic will give you an estimate to fix your car. If the problem is obvious (a light’s burned out, the oil needs changing, your starter is fried), it should be pretty easy for the mechanic to go ahead and make the repairs. If the problem is tougher, it’ll take more time to find the right solution. The mechanic might run some diagnostics, put your car up on the rack, take it for a test drive. But once the mechanic does figure out what’s not working, your car can be fixed.
Running a successful business is similar: it’s not fixing the problem that’s so difficult; it’s figuring out what the problem is in the first place.