 The current schema has been refined to include a ninth style -- "Specialist"—and in addition has renamed the Chairman behavioural style "Co-ordinator" and the Company Worker style "Implementer" (probably more for reasons of 'political correctness' rather than any identified changes in behaviour of people in these classifications).Belbin now administers the refined Belbin Team Inventory via e-interplace, a computerised system which scores and norms the data to produce feedback reports for individuals, teams, groups and jobs.Meredith Belbin argues that the optimum size for a team is 4 people.