The fragile relationship between avionics shops and aircraft owners is sometimes stressed at the end of a project. That’s partly because some owners have unrealistic expectations, assuming the aircraft will be released right after a flight test.
On the other hand, shops create stress for themselves when they overpromise and offer the impression that work on the aircraft is finished when in reality, it might still require testing, tweaking and more work following the flight test.
You can avoid this stress, while increasing safety, by approaching the delivery process with the proper mindset. This includes crafting your own delivery checklists of items to look for before, during and after the shake-down flights with the new equipment. You can also make the delivery process easier by studying how to operate the new equipment, working closely with the shop during the project and not scheduling important trips until you are certain everything works the way it should.