Page 8 of the DSE Security Knowledge Hub, with source-backed guidance, checklists, explainers, and playbooks.
A 911 call from a desk, lobby, elevator landing, guard post, or conference room should connect without a prefix, carry usable dispatchable location, alert the right onsite responder, and survive moves and changes.
Read the playbook
A certified safe room can fail operationally when it is locked, used for storage, missing from the warning plan, over capacity, poorly signed, inaccessible, or not maintained as its approved design requires.
Read the checklist
Alarm coverage is not inclusive when a signal depends on one sense, cannot be perceived in the occupied space, is confused with another warning, or leaves no accessible way to understand and act.
Read the guide
Welding, cutting, brazing, grinding, and other spark- or heat-producing work need one controlled lifecycle: choose a safe location, remove or shield hazards, authorize the work, protect openings, watch for fire, and close the permit only after the area remains safe.
Read the playbook
An emergency responder communications enhancement system must serve the frequencies and critical areas approved by the authority and license holder while controlling oscillation, unwanted emissions, power, supervision, and maintenance.
Read the guide
A perimeter fails at transitions: washed-out grade, loose fabric, a culvert, utility opening, wall junction, temporary repair, unsecured gate edge, climbable object, corrosion, or vegetation that hides damage.
Read the checklist
An automated external defibrillator must be findable, reachable, maintained, supported by trained response and 911 activation, checked after use, and governed under applicable medical and legal requirements.
Read the playbook
High-attendance openings need measurable go, slow, hold, and stop decisions for queues, staffing, entrances, exits, barriers, communication, occupancy, and emergency access before crowd pressure begins.
Read the playbook
Security personnel should protect life, summon authorities, establish a controlled boundary, prevent avoidable disturbance, identify witnesses, and document their own actions without attempting an untrained crime-scene examination.
Read the playbook
Emergency eyewash and drench equipment must match the corrosive-exposure hazard and remain immediately usable. Map each task, walk the real path, remove locks and obstructions, inspect activation and flow, train workers, and treat every impairment as an urgent operating condition.
Read the checklist