The Londoners have been widely criticised for the dismissals of a number past chiefs, but Buck is adamant that they are not eager to hire and fire.
"I know we have fired what most people would say are a lot of managers - terminated the relationship is a better way to describe it - but we've always thought long and hard when we've done it," Buck told Sky Sports News. "It's always difficult, it's always sad when a relationship is terminated.
"We don't look back, we always look forward and see where we're going, and figure out how we get there.
"We certainly believe in stability in managers, but it has to be with the right manager."