Depending on the seniority, you might have a candidate come in and give a presentation to a group of people. The point of this is not specifically to judge the contents of the presentation, but to see how she is at commanding a room, answering questions posed by a group, structuring her thoughts, and getting up in front of an audience. These are skills that a senior manager should possess, and if she lacks those skills, take that into consideration when you’re deciding whether to hire her. I’d caution you not to overvalue this step, however.