Ole Gunnar Solskjaer warned Manchester United's rebuild is a long-term project, while insisting he will only sign players who fit the club's DNA.
United are expected to be active in the transfer market amid links with Borussia Dortmund sensation Jadon Sancho, Napoli centre-back Kalidou Koulibaly and Real Madrid star Gareth Bale.
A number of players are also set to leave Old Trafford, with Matteo Darmian and Antonio Valencia reportedly poised to depart, while the futures of Alexis Sanchez, Ander Herrera, Juan Mata, Romelu Lukaku and Marcos Rojo are uncertain.
United manager Solskjaer – whose side are sixth in the Premier League but only two points adrift of the top four – told reporters: "We plan to be in the top four, we plan to be in the Champions League next season.
"We want players who can keep us in the Champions League and move us up the table. But we know there is not going to be a quick fix. We have to take it step by step.
"There will be new players coming in over summer but I don't think you can expect six. I don't think any manager you ask would be in favour of that amount of change anyway. We want to rebuild but it is going to have to be gradual, over a few windows."
"When I came in, there was an understanding that we had to get Man United's DNA back into the club, the team and the players," Solskjaer continued. "We need to get a culture back. What's the definition of culture? I'd say it's about how we do things here.
"I have my way of doing things – but I do expect them to be done. That might mean small things like having breakfast or lunch together. But I also like my players to take ownership of their own careers and their own futures. That's the type of player I like – and I have been impressed by many of the players we have got here. Not all of them, but a lot of them."
Solskjaer – speaking ahead of Sunday's trip to Everton – added: "I don't know the reason we have signed most of the players who are here. But I do know that they were brought here because they have great quality and previous managers have seen that. But I look for different things than [Louis] Van Gaal did, than [David] Moyes did, than Jose [Mourinho] did. I fancy different types of players – that's just the way it is in football.
"It's not a question of whether I like this player or that player. The question I ask is if they fit into Man United and the style I want this club to play.
"These players have had Mourinho, Louis van Gaal, [Alex] Ferguson, Moyes – four of the best managers there has been in England. But now I am new and I want us to play in different way."
|Neymar should not captain Brazil at Copa America - Edmilson|
|Wahab, Amir and Asif named in final Pakistan World Cup squad|
|Bale staying at Madrid impossible as Zidane is ´not keen´ - Calderon|
|Kroos agrees Real Madrid extension to 2023|
|Gundogan to renew contract talks with Manchester City|
|Folau opts not to appeal against Rugby Australia ban, still considering options|
|Nadal clear French Open favourite – Djokovic|
|Nedved: No Juve decision amid Sarri and Inzaghi links|
|Gil Marin: We need players totally committed to Atletico|
|Gardner´s big game helps Yankees pull away from Rays|
|This is playoff basketball – Leonard on playing through injury in Raptors win|
|Second most NRL games and 99 tries – Cronk´s career in Opta numbers|
|Spieth: I´m almost back at my best|
|Three takeaways from Raptors´ key Game 3 win over Bucks|
|Trail Blazers star Lillard addresses rib injury|
|Raptors top Bucks in double-OT thriller|
|MLS Review: Nani brace lifts Orlando, Galaxy stunned by Rapids|
|Cronk: It´s been one hell of a ride|
|Johnson upbeat despite falling short|
|Koepka holds on at US PGA – how a dramatic back nine unfolded at Bethpage Black|
|´Phenomenal´ and ´mind-blowing´ – Koepka basks in US PGA triumph|
|NRL great Cronk to retire at season´s end|
|Kevin Muscat to leave Melbourne Victory|
|Bethpage wobble does little to deny Koepka´s status as golf´s dominant major force|
|Brooks Koepka´s timeline of major dominance following US PGA triumph|
|Koepka relieved to retain US PGA title after ´stressful´ finish|
|Allegri seeking a challenge, not a sabbatical|
|Koepka retains PGA title despite back-nine collapse|
|Spalletti tells players to prove they´ve the bottle to play for Inter|
|City want to dominate English football forever, says Laporte|
|Fernando Alonso fails to quality for Indy 500|
|Bordeaux collapse to costly defeat, Stade hopes dashed by Montpellier|
|Valverde pessimistic about Coutinho, Dembele playing in Copa final|
|Koepka collapse sets up grandstand finale at PGA|
|Everyone would want our situation - De Bruyne not concerned by Champions League failure|
|Mbappe drops PSG exit hint|
|Guardiola: I´ll be judged on Champions League record at Man City|
|Gattuso thankful to Milan penalty hero Donnarumma|
|Johnson cuts Koepka lead to four with nine to play at Bethpage|
|Arthur ´very confident´ in Pakistan CWC hopes despite losing streak|
|Juventus 1 Atalanta 1: Mandzukic spares Allegri from defeat in home finale|
|Napoli 4 Inter 1: Spalletti´s side crushed as Champions League race goes to the wire|
|Woakes: World Cup wait makes for nervy Monday|
|Koepka retains control of PGA after early wobble|
|Tsonga topples Lajovic in Lyon|
|Galatasaray edge derby to retain Super Lig title|
|Sabalenka ends clay drought in style with Strasbourg success|
|Here´s to you, Vincent Kompany – The giant of Manchester City´s changing times|
|Wonderful Woakes stars as England wrap up 4-0 win|
|AC Milan 2 Frosinone 0: Piatek and Suso keep top-four hopes intact|
|Messi equals Zarra´s record with sixth Pichichi award|
|Ireland outclass Afghanistan in Belfast|
|Ligue 1 sensation Pepe to leave Lille|
|Paderborn clinch promotion back to the Bundesliga|
|Five player-manager success stories for Kompany to follow|
|Nadal breaks 2019 duck by downing Djokovic for ninth Rome crown|
|Roglic pounces on Campenaerts´ misfortune to apply pressure to Giro leader Conti|
|Eibar 2 Barcelona 2: Two-goal Messi moves four clear of Mbappe in Golden Shoe race|
|Dominant Koepka chasing history in final round of US PGA|
|Betis confirm Setien departure|
|Celtic´s Boyata agrees to join Hertha Berlin|
|´I have lived the dream´: Kompany´s best moments at Manchester City|
|Zidane vows to make changes as Navas & Bale face uncertain futures|
|MotoGP Raceweek: Marquez masters Le Mans to make it three wins in four|
|We are the guilty ones - Marcelo says Madrid players must accept responsibility|
|Ten trophies, 360 appearances, 20 goals - Kompany´s Manchester City career in numbers|
|Pliskova seals Rome title with straight-sets win|
|De Bruyne, Neville and a rock ´n´ roll star pay tribute to captain fantastic Kompany|
|Perth Glory 0 Sydney FC 0 (aet, 1-4 on penalties): Redmayne the hero in A-League Grand Final|
|Real Madrid 0 Real Betis 2: Zidane´s men humbled in final-day defeat|