TTX
Table Top Exercise
A tabletop exercise, or TTX, is a role-playing activity in which players respond to scenarios presented by one or more facilitators.
A TTX will involve predetermined 'playbooks' where a specific scenario is followed as documented in a specific playbook.
A playbook is developed for each specific scenario, for example, a playbook on compromised user credentials, or a playbook on a user data breach.
TTX using Playbooks test an organisation's processes to see if they are effective or could be improved.