At what stage of the creative process would a designer determine the target audience for a project?

revision

brainstorming

research

creation

Creation, the designer would need to understand what they are making and for what type of person

At the research stage.

Explanation:

For any successful business or project meant to be use by certain audiences. The audience has to be known before the project is started else what the essence of creating such project. So when researching, target audience must be given enough effort and attention for the project to be successful.