(a) the larger the socalled "TPM footprint" within the corporation, the more sense it makes to utilize the full TPM capability via ERAS. Think about it, ERAS brings the whole gamut of TPM related services to the table and so at some tipping point (like the auto deal)it makes sense to employ ERAS
(b) Here is the core reason for switching on ERAS. It is the AUDIT TRAIL capabilities of ERAS that makes it very compelling to a corporation like PWC. Dr. Bob has been shouting from the rooftops lately about not only security but COMPLIANCE!!!! This is probably why PWC got so interested in WAVE SYSTEMS in the first place.