Roberto Martinez says he has identified the transfer targets he wants to bring to Everton this summer.
The Spaniard has a sizeable budget as the Toffees are yet to spend all the proceeds of Marouane Fellaini's 27.5 million-pound move to Manchester United last summer.
But the Goodison Park boss has lost three loan players -- top scorer Romelu Lukaku, winger Gerard Deulofeu and midfielder Gareth Barry -- and will need a bigger squad to compete in the Europa League next season.
Martinez's signings last summer helped Everton finish fifth in the Premier League and he knows which players he wants to continue their progress.
"Recruitment is vital. It's one of those moments of the season where you recollect the good work you've done over the last two windows," he told Everton's official website.
"The recruitment department have been working tirelessly to get the reports and highlight the targets and players that are going to fit in our football club. You can imagine it's a long process.
"We've identified the players and now it's about making sure we can get them to join.
"It's very much an important period, but it's not one where we need to panic. We don't have to make decisions just to bring numbers into the club.
"Everything has to be measured and everything needs to be taken on the understanding that bringing the wrong player into this special group of players that we have could have a very negative effect."
Martinez is eager to ensure that Everton's Europa League campaign does not damage their domestic form and feels more signings will be crucial.
He added: "It's a key period to make the right calls and the right adjustments, but recruitment is going to be vitally important because of the demands of European football. It's something we want to embrace.
"We don't want to feel that we have to blame European football as the reason we cannot keep the standards in our domestic league."