What this means is every repair job has a set price. Say your car needs a new water pump, and the book says this job pays one hour labor. At times he will run into a broken bolt, or a rounded off bolt, and the labor book does not take these types of things into consideration. Not fair is it, but it's part of the job. The price of tools rises as fast as they can make them.
Most good mechanics invest a major amount of money in tools.
Just today I received an e-mail from a lady named Kay from Michigan who said her car would stall at times, and she never knew when it would do this. She took it to a shop, who she said, tried very hard to fix her car for over a week. Changing the fuel pump 3 times, and installed new plugs, but it didn't fix her problem. So she took it to the dealership. After two days they called and told her to pick up her car anytime, because it would not stall for them so they didn't fix it.