Essentially, the offender management approach rests on the pivotal role and authority of a single offender manager to ‘manage’ an offender. This is based on a tiering that determines the allocation and type of supervision to the level of risk of reoffending posed by the offender (Home Office 2006h). The model involves the development of a single plan, drawn up by the offender manager, which spans the whole sentence and which describes what is to be done by whom and when in order to achieve all the objectives of the sentence passed, and any other objectives associated with the implementation of the sentence. The model also identifies the key roles of offender supervisor and case administrator that, along with the offender manager, constitute the offender management team.