With the Spireites parting company with manager Dean Saunders on Saturday evening, chief executive Chris Turner sat down to discuss the decision with PlayerHD.
Saunders' dismissal came shortly after a heavy home loss to struggling Swindon Town, the team's fourth successive defeat in Sky Bet League 1.
"It's never a good time when a manager leaves a football club," he said. "The 4-0 defeat to Swindon Town was in Dean's own words an unacceptable performance and it was a bad afternoon for the club."
"The decision was made partly due to Saturday's performance but also through the three previous results, which were all defeats.
"We've only won two home games all season and you could see a lack of confidence in the players on Saturday. The whole stadium had a lack of confidence in what was happening at the club."
Assistant manager Brian Carey also followed Saunders out of the club, with academy manager Mark Smith stepping in as caretaker while the club recruits its new manager.
Turner explained that he was saddened to have to say goodbye to Saunders but that the decision was made in the best interests of the club's future.
He said: "It's a case of how long do you let the process go on for? Dean was very professional here and did a lot of good things and I'm very sad to see him leave.
"The club has to think of its short-term as well long-term strategy and with the FA Cup tie here on Saturday against Walsall I think it would have been detrimental to the team if this decision hadn't been taken."
To watch the full interview with Turner, click on the video above or sign up to Spireites PlayerHD here.