Project Insight offers two options when you want an assignment on a task, but not a specific individual. Those options are Placeholder Resources and Resource Types.
Placeholder Resource are good if...
- You have multiple different types of resources working on the same task. I know this isn't PMI, but it's real world
- You need to calculate a cost $ value for a project before you know who's working on it
Resource Types are good if...
- You don't want to get that granular and just set aside the task as a skill type
- Your tasks are separated by skill and only one type of resource can do each task
Both Placeholder Resource and Resource Type will come over onto a newly created project from a Project Template, so why don't you try them out and see which one fits best!