My methodology is not to have one.
Any fixed categorisation can limit our approach to most problems.
I was studying in one of Europe's leading conservatoire, and in USA as postgraduate student. Also attended masterclasses of world-famous teachers and concert pianists in the US, in Spain, Italy, England, USSR, Hungary and I am price holder of national and international music competitions in Hungary, USA, Portugal E.g Joanna Hodges International Piano Competition, in Palm Desert, Porto International Piano Competition in Porto, Oklahom Symphony International Music Competition, etc. I have also held masterclasses and lectures in Ireland, England, Spain, Italy, Japan, China and Hungary.