Which description best defines a Partial Failure?

Which description best defines a Partial Failure?

• A. A failure which would allow an intruder to cross only one line of detection at an area that has two lines of detection at the boundary
• B. A complete system outage
• C. A temporary sensor misread
• D. A false alarm event

Answer: (A)

Partial failure means only part of a multi-line boundary protection stops functioning, creating a gap that an intruder can exploit. When a boundary is defended by two independent detection lines, a failure in one line leaves the other line in place, so an intruder can cross at that spot by bypassing the failed line and triggering only the remaining line. This is different from a complete system outage, which disables everything, a temporary sensor misread, which is a transient issue, or a false alarm, which is an unwanted trigger without an intrusion. The description that best captures partial failure is a failure that would allow an intruder to cross only one line of detection at an area that has two lines of detection at the boundary.

Partial failure means only part of a multi-line boundary protection stops functioning, creating a gap that an intruder can exploit. When a boundary is defended by two independent detection lines, a failure in one line leaves the other line in place, so an intruder can cross at that spot by bypassing the failed line and triggering only the remaining line. This is different from a complete system outage, which disables everything, a temporary sensor misread, which is a transient issue, or a false alarm, which is an unwanted trigger without an intrusion. The description that best captures partial failure is a failure that would allow an intruder to cross only one line of detection at an area that has two lines of detection at the boundary.