Party bonus

Anyone know how the party bonus works? I've been in a party of four that has given a +12% success rate, while another party of eight has given +12% as well. Is it people with higher Engineering rank or Production rank adding to it?

Yes.

That was not a yes or no question.

Engineering Rank.

Thanks. I was looking for something like this: Party#Production_Party_Bonus I thought it would be different for every skill, like how in blacksmithing only the completion amount is affected and by 1% per person.

It needs to be publically announced, that Production Mastery rank does not affect party bonus, but actually the skill being used does. That way there wont have to be Rank 1 Production parties, but not like that matters anymore since long ranged party board doesn't work anymore.

It does to some degree...albeit that the leader is around 30 meters away from the board...which isn't far.