SUNDERLAND chairman Niall Quinn promised that there will be “no stone unturned” in the inquiry about why the club’s season faded.
Quinn spoke to fans of the club’s London supporters’ branch ahead of this weekend’s 3-0 win at West Ham.
He and chief executive Steve Walton believe progress is being made, but pledged that Sunderland would not become complacent.
Sunday’s victory meant the Wearsiders finished in the top half of the Barclays Premier League for the first time in a decade and only the third time since the 1950s.
Walton told safc.com: ““We believe and are optimistic that this club will be a little bit better every season.
“That’s all I ask of any part of the business or club: to try to do better this year than last.”
And Quinn said: “We’re building something to ensure longevity of success.
“We don’t intend to be a ‘flash in the pan’ club where we do it for one year but then struggle afterwards.
“Take Portsmouth for instance, a fantastic team Harry Redknapp put together that went on to win the FA Cup in 2008 and was a great moment in their history.
“But, I tell you they’re paying for it now.
“People want success at this club yesterday and while nothing would give me more pleasure than to give you a second major cup since World War Two, we need to get there in time.
“We know we’ve been derailed by injuries throughout the season and there is a thought in everyone’s mind about ‘what might have been’ over the last nine months for Sunderland.
“But I assure you, no quarter will be given or stone left unturned until we find out what has gone wrong over the last three months.
“And mark my words, the things that need to change will do so.”