Writing a methodology is not implementing one
Most serious youth clubs now have a written methodology. It took a technical director months. It describes the moments of the game, the principles the club plays by, the profile of a player at each age group. It is usually good work.
Then it is distributed, presented at a preseason staff meeting, and stored somewhere. Six months later the honest question — is this what is being coached on our pitches every week? — cannot be answered by anyone in the building.
A club has an operational methodology when it can show what was delivered against it and what was observed as a result. Until then it has a document about a methodology, which is a different thing.