Middlesbrough chairman Steve Gibson says he plans to make changes in "all aspects" of the club after their relegation from the Premier League.
Boro's drop from English football's top tier was confirmed with a 3-0 defeat by Chelsea on 8 May.
Speaking to BBC Tees, Gibson admitted that key decisions made at the top level contributed to their downfall.
"The fact that we haven't fulfilled our objective tells you we've made mistakes," said Gibson.
"It's heartbreaking really. The season's been really tough. You make decisions and your mistakes are a retrospective view of the decisions you make.