Berg stated an immediate return to the Premier League was the only acceptable target when unveiled as Steve Kean's successor at Ewood Park earlier this month and is unmoved despite failing to register a victory in his first three matches at the helm.
A 2-0 defeat at Crystal Palace was followed by draws with Huddersfield and Birmingham, with Rovers holding the lead both games.
Ahead of Saturday's trip to face strugglers Peterborough, Berg said: "It's a very good squad and our ambition is to go up, there's no doubt about that.
"We just have to make sure that we improve as a team and we take it step by step. I think with the right attitude I think we can be promoted this season.
"All games are hard games in this league. We just have to make sure we have the quality so that we win games instead of drawing."