In the light of the mixed and clearly inadequate results achieved by the Treaties of Amsterdam and Nice, when set against the challenge posed by the doubling in the number of Member States, but also that of the further deepening of the Union, it became more and more apparent that the established method of revising the Treaties was no longer able to provide genuine responses to the issues raised by the development of Europe.
Ņemot vērā Amsterdamas un Nicas Līgumu nepietiekamos un nepārliecinošos rezultātus un problēmas, kas radās, dubultojoties dalībvalstu skaitam un Eiropas Savienības saitēm kļūstot ciešākām, tapa arvien skaidrāks, ka pastāvošā līgumu pārskatīšanas metode nespēj vairs sniegt apmierinošas atbildes uz jautājumiem, kas rodas Eiropas attīstības gaitā.