Rasmus Ankersen has admitted Brentford made a mistake in appointing Marinus Dijkhuizen and claimed the Dutchman's work behind the scenes at the training ground was the reason to part company.
The Dutchman spent four months with the club and three months with the team and Ankersen felt the tough decision was made to part company on Monday.
While the co-director of football insisted the club made the right decision to appoint the former Excelsior trainer it was clear a mistake had been made.
He told the club's official website: “I think when we appointed Marinus and Roy this summer we all felt we had done an extensive research process.
“We really felt it was the right decision, but three months later we just have to put our hands up and say we made a mistake. It wasn't the right decision.
“There have been some fundamental processes at the training ground that didn't work to the level we expected.
“We've been trying to improve that over the past few months and it hasn't improved to the level we wanted it to.
“So in the end we felt that the right decision was to make a change, rather than try to protect something that we didn't really believe was going to work.”
It has been suggested the club have panicked in axing Dijkhuizen but Ankersen was looking to take a long-term view.
Ankersen added: “It looks like we made a panic decision and I don't feel this was the case.
“It was not a decision based on eight league games, it was based on three months of training and there were some fundamental processes – in terms of getting a full football operation to work to its maximum – that weren't at the level we wanted them to be and this was our concern.
“It could have an an influence, or a negative impact, on results in the longer term if we didn't take action immediately.”
Brentford will learn lessons from the decision to appoint Dijkhuizen and will conduct an internal inquiry to adapt in the future.
Ankersen explained: “We looked back and we made a mistake, but we have to learn from that and there are definitely lessons to learn.
“We are already speaking about how to do this differently next time. Recruitment is a difficult discipline and is very difficult to get right all the time but you try to be less and less wrong, and that is what we are working on.”