Most organisations have several ‘tiers’ of vendors. Vendors may be ‘tiered’ based on a variety of criteria such as deal size, criticality of service delivered, regulatory impact etc. In all cases client organisations will apply varying levels of risk, issue and performance management depending upon the Tier the supplier fits into. It is a very sensible approach but most organisations struggle to ensure that vendors in the same tier are managed to the same level and consistently. Tiering creates the illusion of consistent vendor management. Why does this problem arise?