PRTM is by far the more respected supply chain consultancy. As well as developing the SCOR model and being a founder of the Supply Chain Council (all this from their website), they run frequent surveys in the area to give themselves real data to back up their expertise. ATK was certainly a leader in this field, but has not regained the place it had pre-EDS. E&Y is still developing structure to its supply chain process, although they have a large team.
