People are Persistent
What we mean by this is that you enter the person into VSys once, and then tie that person to all kinds of events, jobs, and other properties in the system without ever having to input their information again or without having to back out of your current process to make changes to the person's information. You can view and update their details from anywhere in the system where you refer to the person, such as within a project and job assignment, lookup/search, as well as in the data entry panels. The Volunteer Profile is everywhere. Once a person is entered into VSys, that person takes on more attributes and a deeper history as their situation or relationship to the organization grows over time. This data persistence helps you to tap into potential volunteer resources that might otherwise be forgotten.
It also means that any changes made to a person in one place affect that person everywhere: change "Jim Doe" to "James Doe" from within a project, and his name is changed everywhere in VSys all at once.