Assessment and Evaluation Flashcards

In a physical protection system (PPS) evaluation, what is the 'critical detection point' on an adversary path?

Answer: The last point where detection still leaves enough remaining delay for the response force to interrupt

Detection after the critical detection point is too late because the remaining delay is less than response force time.

The EASI model, developed at Sandia National Laboratories, is used to calculate which value?

Answer: Probability of interruption along a single adversary path

EASI (Estimate of Adversary Sequence Interruption) computes the probability of interruption for one specific path.

An assessor finds that one entry path has heavy delay barriers, but a loading dock path has almost none. Which design principle is being violated?

Answer: Balanced protection

Balanced protection means every adversary path should give about the same level of detection and delay, so the weakest path doesn't decide overall effectiveness.

Probability of detection for an alarm system is best described as the product of which two factors?

Answer: Probability of sensing and probability of assessment

An alarm counts as a detection only when a sensor activates and the alarm is correctly assessed.

Overall system effectiveness P(E) for a PPS is commonly expressed as which equation?

Answer: P(E) = P(I) × P(N)

Effectiveness is the probability of interruption times the probability that the response force neutralizes the adversary.

During a vulnerability assessment, what does an Adversary Sequence Diagram (ASD) primarily model?

Answer: Physical areas, protection layers, and path elements an adversary must pass to reach a target

An ASD maps layers and path elements so analysts can find the most vulnerable adversary paths.

An alarm caused by wind-blown debris setting off a fence sensor is classified as which type?

Answer: Nuisance alarm

Nuisance alarms come from real stimuli that aren't intrusions, such as weather or animals, while false alarms come from equipment faults.