Shelter-In-Place Procedure (Definition)

For some emergencies the best course of action is to retire indoors into protected areas. For example, the evacuation of a building following a bomb threat may place people at risk rather than remove them from it, and a dangerous situation (such as a shooting) outside a building might warrant retreat away from building windows and into basements.

This procedure is known as a shelter-In-Place procedure.

Note that it differs from a lockdown procedure in that the perceived threat does not armed intrusion, and so impeding movement is not a priority.