There is a certain number of mistakes to expect to happen during a large project. What generally happens is the first trade does something to create a problem, and leaves it for the next trade, who somehow creates a worse situation. Eventually the builder notices and then it can be a really big headache to undo the mess. I like to feature my construction screw-ups so we can learn to avoid it next time. The only way to identify these early enough to catch the presumptively is to be on site a lot and know what to look for.
Often the mistake can be just a matter of inches, or even fractions of an inch. In a recent example the receptacle was installed just a little too high. Likely the electrician built in some margin of error so the receptacle definitely would not be installed to low (that would be even worse). Once I realized the situation he was able to correct, it so no harm done. This is a minor instance of a construction headache. We have worse.
How would this look once we tile the backsplash? Not good. The plug needs to be just over 36 inch off the floor or it will just not work.