Eight real diagnostic scenarios — intermittent camera loss, false propped-door alarms, analytics false alerts, biometric false rejects, network congestion, a dead card reader, early storage exhaustion, and a compromised camera — worked as Symptoms → Diagnosis → Testing → Resolution.
A physical security system spans network infrastructure, power delivery, mechanical devices, and software configuration all at once, so a reported symptom can trace back to any one of those layers — guessing wastes far more time than a structured elimination process. This module works through eight real failure scenarios end to end: the reported symptom, how a competent technician narrows the cause, what test confirms it, and what the correct resolution actually is.
The scenarios span every subsystem covered earlier in this program — PoE/power, access control hardware, video analytics, biometrics, networking, storage, and cybersecurity — and this module assumes the design content from those earlier modules, which is exactly where most of these failure patterns first get caught in the field.