Kyocera Product Configurator
| | Specific Cause | Direct Effect | Severity | Likelihood | RPN | |-------------------|--------------------|-------------------|--------------|----------------|---------| | Sensor/Detector | Dust accumulation | False alarms → occupant complacency | 4 | 5 | 20 | | Sensor/Detector | Faulty smoke detector | No alarm during real fire | 5 | 3 | 15 | | Power Supply | Battery failure (low charge) | System operates only on AC; fails during outage | 4 | 4 | 16 | | Power Supply | Transformer overload | Complete system shutdown | 5 | 2 | 10 | | Human Interference | Accidental pull station activation | Unnecessary evacuation, emergency response diversion | 3 | 5 | 15 | | Human Interference | Deliberate sabotage (disabled sounder) | No notification to occupants | 5 | 1 | 5 | | Design/Installation | Inadequate detector spacing (e.g., near HVAC vents) | Smoke dilution → delayed detection | 4 | 3 | 12 | | Design/Installation | No backup notification for hearing-impaired | Critical population not alerted | 5 | 2 | 10 |
Here is a simplified example of what a cause and effect matrix might look like for a mid-sized office building:
The purpose of commissioning is to make sure the system operates correctly, including verifying that all sensors function correctly, all outputs operate correctly, and the cause and effect linkages are correct. This involves end-to-end testing, not just at the panel level, to ensure the correct sequence of outputs and the operation of all interfaced systems. fire alarm cause and effect matrix
Sounders, voice evacuation public announcements (PA), and flashing strobe lights.
The matrix is typically presented as a two-axis grid. Causes (inputs) are listed in rows on one side, while effects (outputs) are listed in columns across the top. A check mark or "X" in a cell indicates which effect(s) a specific cause will trigger. This clear, visual format makes it easy to interpret and verify the system's logic. | | Specific Cause | Direct Effect |
Once the C&E matrix is created, it must be rigorously verified and tested. This is a critical step to ensure the system operates as intended.
: Acts as a checklist for annual "end-to-end" testing to ensure the system still performs as designed. Reduced Error The matrix is typically presented as a two-axis grid
A standard matrix is typically formatted as a spreadsheet or grid. The vertical axis (rows) lists all potential input devices or zones, while the horizontal axis (columns) lists all output actions. The intersecting cells use symbols (such as an "X", a "D" for delay, or a "C" for coincidence) to indicate the required relationship. 1. Common System Inputs (The Causes)
Once approved, the matrix is handed to the fire alarm programmer. After programming, a must be performed. Every single line item on the matrix must be physically tested to ensure the software logic matches the real-world performance. Conclusion