I believe in doing the job better than it has ever been done before. It is the client who gives the final word and approval, and the one who has to live with the art placement decisions that are made.
My approach to hanging artwork:
Everything I have ever done in life: art, conservation, drapery installer, framer, mat-cutter, math teacher, museum preparator, painter, science teacher, sculptor, and toy maker, have all been beneficial to my experience in art consultation and installation. Sensing out what the client wants is foremost.
There are many things to consider simultaneously in art placement, such as the color of the wall, the size of the artwork, the appropriateness of the artwork for the room, the color of the furniture and surroundings, etc.