Does your shop do a pre-purchase inspection? Most shops do, and they charge around an hour to do so. If you had a good, better, and best program, you could charge an hour for the best, half an hour for the better, and free for the good. Have a laminated sheet at your front counter to hand to the customer and ask them which one they would like. Most will choose the better option. Now, your techs are getting paid to do DVIs if they are on a flat rate, or the shop is getting paid if they are already paying the techs to do it.
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