Activity entities

Event	An instance of significant change in the situation	more
Trigger	An input initiating an event	more
Situational transition	A change of the situation due to an event	more
State Transition	A change of the mode due to an event	more
Extended transition table	A table representation of situation transitions.	more
Activity	The sequence of events in a session	more
Operation	the operators' activity during the interaction.	more
Behavior	The transitions of situations accompanying the activity	more
Procedure	A sequence of state transitions during an interaction associated with a scenario	more
HMI	A model of Human-Machine Interaction	more ...