I would like to confirm that the word 'team' is a collective noun and when one uses it in sentence like ' the team ', it should be followed by 'is' instead of 'are' which I am arguing with my colleagues. Please can you help by confirming the right grammar to it?
Thank you very much.
Yes, team is a collective noun.
It is used with a singular verb when the unity between the members of the group is stressed,when you see the group as one entity, and with the plural verb if you see a group as a collection of individuals, and you are paying attention to each of them.
AND I think that with "the team" you can use either singular or plural verb. It depends on what you are emphasizing, as I've explained above.