'methodically-performed' originates from the combination of 'methodically' and 'performed', where 'methodically' comes from 'method' meaning 'a systematic way of doing something', and 'performed' from 'perform' meaning 'to carry out an action'.

'Methodically' evolved from the Greek word 'methodos', and 'performed' from the Old French 'parfournir', eventually becoming the modern English 'methodically-performed'.

Initially, it meant 'carried out in a systematic way', and this meaning has largely remained the same in modern usage.