Answer:
While editing, rehearsing, and evaluating.
Step-by-step explanation:
There are different stages of creation and presentation of a document or information before reaching the final stage. A team will most likely determine if they are fulfilling it's purpose and meeting the needs of the audience, of the task, etc, when editing, rehearsing and evaluating what will they say and present to the public. It's in this late stage in which one can see what the presentation lacks, what to reinforce, what to cut, etc.