not changing the tactic/plan has to be on the coaching team, unless the players just arent doing what's been asked of them???
Also could be deficiency in the squad where other tactics just aren't working in training?
true, but that's still on the coach to make things work or change things to suit the players you have.
We have speed out wide, but that cant be utilised when you play 3 quick midfielders centrally. 4-3-3 doesnt work, the front 3 never see the ball or if they do it's due to them coming deep to find it. This s down to the mid three losng posession so often, which in turn puts out defence under pressure.