Accuracy
Accuracy is very important when it comes to Factual Programmes, it helps build a bond between you and the audience. If the audience cant trust the journalist, nor rely on the facts that he gives then he's not achieving with what he set out to do. It is the journalists job to not mislead the information that you have gathered. If the news that is given to the audience misleading or not accurate then they can be punished by OFCOM, OFCOM where the one who created TV guidelines for Television and Radio. journalists need to make sure that the news that they are sharing is correct.
Balance
It is also important to keep Balance in Factual Programmes in order to keep arguments fair on both sides. They have to be careful to not lose there audience, on that account they have to keep their stories balanced, the last thing a journalist wants to be and that's bias, you would have to keep equality of information especially in political subject. For a Programme to run well and correctly, it needs to have facts, trust and accurate information.
Impartiality
Impartiality is just simply being fair, not having to take sides and being fair minded about it. Its important because you want to make sure that both sides are being heard, you could push in your own opinion or make a judgement, but its important that you appear at your judgement impartiality.
This could also mean challenging your own assumptions, but you will have to weigh the argument by giving it balance and testing both strengths and weaknesses of both sides of the argument.
Objectively
This is all of the facts and proof to backup your opinion or story. Objectively is important in Factual Programmes because to be able to get your point across, you're going to need the facts and some proof that can backup your opinion.
Subjectively
This is more of your own opinion, feelings or thoughts, but with this its more just based of your own thoughts and opinion rather than the actual facts.
Biased
Bias means one sided. If you are one sided and don't even consider listening to the other side of the story or even try to balance the information then you will lose your audience and probably receive complaints.