An Action can be used to manipulate a model during a simulation. Actions are primarily used in Agent Based Modeling.

An Action is defined by two features:

• Trigger: What triggers the Action (a timeout, a probability, or a condition). See the Transition primitive description for more information on triggers.
• The Action: What the Action does when triggered. This can be to move an agent, to change a primitive's value, to add a connection to an agent, or many other actions.

An example of an action for an agent might be to have the agent die off if its health falls below a threshold:

if [Health] < 0 then
  Self.remove()
end if