Based on my experience, the quality department in my company has to deal with all other departments so the relations between the quality department and all other departments are not bad. In my company, the quality department attends every meeting to make sure that we are on the same page and that no work has to be redone for any quality issues. THe quality department has to make sure that the parts go through all the testings and that it meets all the requirements, and it has to deal with customer complains. So the only reason to have bad relations between the quality department and the others is to have issues with the part itself, which should have been considered from the beginning, so it is not their faults which leaves us with no reason to have bad relations. But the quality department has to consider that if the issues are let’s say 0.02% of all the parts produced then it should be ignored because it is a really small portion of production.