Application Notes
Cost is important but are there any other questions that need to be asked in selecting a calibration supplier? Is the ubiquitous ISO 9001 registration enough?
If your car needed a 12,000 mile service you might expect the choice of garage to be somewhat arbitrary. You’d probably expect that, wherever you took it, the maker’s recommended procedures would always be followed and that recommended tools and parts would always be used. This would be even more likely if the garage had “Approved Main Dealer” status.
What are you looking for?