The BDO Invitational tables are open to all members of the BDO or WDF recognised organisations.
The points total is made up of a player's best 8 events within a 12 month qualifying period from the list of events.
The tables are not 'rolling systems'. Points are added & deleted at the end of each period.
The invitational tables are the sole basis of the criteria for qualification, invitation and seeding for each major tournament. More.