Employing a Fortune mechanic (dice, cards, etc) prior to fully describing the specific actions of, physical placement of, and communication among characters. The Fortune outcome is employed in establishing these elements retroactively. This technique may be employed with the dice/etc as the ultimate authority of success or failure (e.g. Sorcerer) or with the dice/etc outcome being potentially adjusted by a metagame mechanic (e.g. Hero Wars).

References:

• Ron Edwards' review of Hero Wars
• Alyria forum