Agree with 172 about briefings, but after reading our ASRs I am changing my attitude to these things as most incidents seem to occur at our base, so complacency maybe rife.
I also agree with not dying in a ditch over non safety deviations. But if the deviation is also clearly inefficient I think it is my duty to press for some kind of acceptale rationale, but at the end of the day he is the boss.
However, when I do have to insist on a different course of action, it thus far has never resulted in a tense day. Quite often the conversation has the potential to get a little tense as some guys can get a bit defensive initially, but so far I have always found a way to get my concern across and dealt with without sacrificing the convivial atmosphere. My most difficult time was with a TRE inappropriately interfereing with the decision making process on a line check! But we survived