Singh held talks with boss Henning Berg, managing director Derek Shaw and operations director Paul Agnew to discuss the club's form after picking up just one win in their last eight matches.
Blackburn, who were favourites for promotion at the start of the season, are currently four points outside the play-offs with pressure already growing on manager Berg.
Singh has promised to take action in a bid to try and arrest the slump in form.
"After a 4-1 home defeat and a performance and a result like that it is inevitable there was going to be a post mortem, after 21 games as well," Singh told the Lancashire Evening Telegraph.
"We discussed and deliberated things, myself, Henning, Derek Shaw and Paul Agnew and they were serious and intense discussions where every subject was talked about.
"Everything from under-performing players, to unhappy players to backroom, management and coaching staff. Things had to be debated and everything is now very clear, now we know the direction we are heading in and what decisions have to be taken.
"Decisive decisions and actions were needed and they will be taken, I just ask fans to respect our wishes for a bit of time to bring them into fruition.
"I can't and won't talk about specifics. After 21 games, it is natural this was the time for a post-mortem and that means every individual has to be assessed. We assessed everything and made some decisions.
"The pressure is on. We did not expect this to be easy and it hasn't been but the decisions have been made that need to be made."
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