Nature of the event, e.g, Public exhibitions, Sport event, Concerts.
Venue, e.g, Stadium, Arena, Park, Camping, Temporary structures.
Audience profile, e.g, Family, Adults, Children, Mixed.
Past event history, e.g, Good previous data, First event.
Expected number of attendees, e.g, 25 000, 80 00 95 000,etc.
Time of year, e.g, Summer, Autumn, Winter, Spring.