A team is not a bunch of people with job titles, but a congregation of individuals, each of whom has a role which is understood by other members. Members of a team seek out certain roles and they perform most effectively in the ones that are most natural to them.
Dr. R. M. Belbin

Belbin Team Roles are used to identify people's behavioural strengths and weaknesses in the workplace. This information can be used to: Build productive working relationships Select and develop high-performing teams Raise self-awareness and personal effectiveness Build mutual trust and understanding Aid recruitment processes

Belbin Team Roles measure behaviour, not personality, and so can be defined as: A tendency to behave,
He or she will challenge, argue or disagree and will display aggression in the pursuit of goal achievement. Two or three shapers in a group, according to Belbin, can lead to conflict, aggravation and in-fighting.
Plant
The plant is a specialist idea maker characterised by high IQ and introversion while also being dominant and original. The plant tends to take radical approaches to team functioning and problems. Plants are more concerned with major issues than with details.
Weaknesses are a tendency to disregard practical details and argumentativeness.
Resource Investigator
The resource investigator is the executive who is never in his room, and if he is, he is on the telephone. The resource investigator is someone who explores opportunities and develops contacts. Resource investigators are good negotiators who probe others for information and support and pick up other’s ideas and develop them. They are characterised by sociability and enthusiasm and are good at liaison work and exploring resources outside the group.
Weaknesses are a tendency to lose interest after initial fascination with an idea, and they are not usually the source of original ideas.
Company worker/ implementer
Implementers are aware of external obligations and are disciplined, conscientious and have a good self-image. They tend to be tough-minded and practical, trusting and tolerant, respecting established traditions. They are characterised by low