Whether global or ad hoc deterrence strategy, take the following into account:

• Responsiveness: Can your strategies respond quickly to individual or group security needs?

• Adaptability: Can your strategies be quickly adapted to new circum stances, once the risk of attack is over? A defender may have several options available, for example to either hide or to live at other people’s houses for a while. Such strategies may seem weak or unstable, but often have great endurance.

• Sustainability: Can your strategies endure over time, despite threats or non-lethal attacks?

• Effectiveness: Can your strategies adequately protect the people or groups in question?

• Reversibility: If your strategies don’t work or the situation changes, can your strategies be reversed and/or changed?