Receiving a bad grade from close professor? Hello I am doing my masters and I got relatively bad grade from a professor. I am going to do another project with him in this semester. I think I deserve a better grade but the problem is that only way to re-evaluate my report is to make a complaint to study committee or to dean. My professor is a very nice person and he is one of the best in the area may be the best,and our communication is good he even wrote "look forward to seeing you". He was very satisfied with my lab. work but I messed up writing report, because he said that I should not write lots of theory but now one of the evaluation report says I should have write more theory(He is not the only evaluator, there are 2 more sensors who I dont know). It's so sad that I got a bad result, but I also don't want to lose healthy connection with the professor. I am doing my masters one of the best universities in Europe and I want to do Phd after my masters so grade is important for me and also recommendation is important for me. I dont know what to do, do you have any suggestions?
It is true that a good grade is worthy (every student wants a nice grade). However, it is not uncommon to score somehow “poorly” while you expect the best result. So, if your results are contrary to your expectations and if you have reason to believe that what you earned is not what you deserve (in the sense of your achievements in exams, presentations, written reports, etc), you may need to take some course of action as per your university’s rules and regulations.

I think, a useful first step would be to ask your professor to show you how you have been graded and what you did right and what you did wrong. That would also be a good opportunity to learn from your mistakes (if any). You may also have the opportunity to discover if there were any mistakes on the side of your professor in evaluating (correcting) your report. After talking to your professor, if you are convinced that the grade you got is what you deserve, then you have to accept that and learn from  the things you didn’t do well. If, with your discussion with the professor, you find out things necessitating revision of your marks (re-grading), that would be accomplished as per your university’s rule. If you still cannot resolve the issue after discussing with your professor, you may follow your university’s formal appealing procedures. But when you do so, have a convincing reason for why you are questioning your  grade. How much time you have devoted on the work or the fact that you need a good grade to pursue a PhD, I think, are not reasons strong enough to justify appealing. What is it that you correctly did but for which did not earn the deserved mark? Such things should be at hand. (I feel many things vary from university to university, but this is what I think you could consider).