Taking the communication concept a step further .......... the piecer should have this discussion with their LAQ as to what s/he would do if/when BEFORE the work commences. And together they should come to an agreement re standards from both sides, when there are no issues at hand.
I have a good relationship with my LAQ, and she knows my standards and expectations for my own work. If I were to take something that I had missed, and not to my standards, I know she would be on the phone quickly to me. One time I took a quilt top that had been flat, and then all of a sudden changed. I frog-stitched and re-frogged and seemed to be getting no where. I was stymied and finally I took it to her to discuss, before I went any further with it. She told me that while it was not as flat as mine normally are, it was far better than many she receives! I was honest ... and she helped me figure out what to do, and I took it home and finished it off. At quilting time, we used poly batting. It can't fix problems, but it can be very forgiving and in this case, it allowed her to manipulate it a little and in the end, we had a flat top! Yes, a wonder woman! NO, I do not expect her to wave a magic wand if/when I have another problem quiltchild!
In contrast, she showed me one that she had to fix and what she had done ... and told me how she had repeatedly tried to coach the owner, only to fall on deaf ears. She clearly was getting frustrated, as she doesn't mind helping to teach, IF it is accepted. At pick up time there was going to be a very serious "communicaton" session .... about how to's, expectations ..... and if not, then ..............!!!!!!!!!!!
