APPENDIX C
EASI Model
The EASI method calculates the probability of interruption of an adversary action sequence aimed at theft or sabotage. This is the probability that the response force will be notified when there is sufficient time remaining in the sequence for the force to respond. The notification of the response force is called an alarm and the probability of alarm is
where P(D) = probability of detection and P(C) = probability of communication to the response force.
In the case of a single detection sensor (or other possible means of detection), the probability of an adversary action sequence interruption is given by
where P(R | A) = ...
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