I honestly have no concept, I made my work... the best possible technical things i could make at the time...
I then made sure that they seemed fairly abiguous.. however could also hold great meaning, to find out how the 'board of studies' determines works with good concepts I read all the information i could on em... it turns out if you can show a similiar theme thoughout ur body of work, some signs/symbols, maybe a little text you'll be considered to have strong conceptual strength...
So I made all my works pretty much with the same colour scheme, I put little signs and such.... I used the layout of a famous photographer, i gave them ambiguous titles.. .and used some lyrics from bands that i doubt the makers know underneath these titles to help suggest some deeper meaning...
Seems i tricked them!