| Column | Good Practice | Common Issue | |--------|---------------|----------------| | | Uses unique, permanent device labels (e.g., L1-D3 ). | Uses temporary labels ( Smoke 12 ) that change during installation. | | Cause (Input) | Specifies device type and condition (e.g., Heat detector – normal > alarm ). | Vague terms like “any fire signal” without excluding fault/isolation. | | Effect (Output) | Lists exact action, delay, and duration (e.g., Release Door A – immediate – latch until reset ). | “Activate sounders” – no distinction between alert, evacuation, or different sound patterns. | | Dependencies | Notes if effect requires confirmation (e.g., two detectors or pressure switch). | Ignores cause-and-effect chains that interact (e.g., disabling ventilation for smoke control but overriding for sprinkler flow). | | Overrides | Clearly states manual overrides (e.g., firefighter’s switch). | No mention of overrides – leads to unsafe manual control later. |
Automatically alerting the monitoring station or local fire dispatch. fire alarm cause and effect matrix
These are the triggers, such as a smoke detector activating, a manual pull station being tugged, or a sprinkler flow switch tripping. | Column | Good Practice | Common Issue
| Column | Good Practice | Common Issue | |--------|---------------|----------------| | | Uses unique, permanent device labels (e.g., L1-D3 ). | Uses temporary labels ( Smoke 12 ) that change during installation. | | Cause (Input) | Specifies device type and condition (e.g., Heat detector – normal > alarm ). | Vague terms like “any fire signal” without excluding fault/isolation. | | Effect (Output) | Lists exact action, delay, and duration (e.g., Release Door A – immediate – latch until reset ). | “Activate sounders” – no distinction between alert, evacuation, or different sound patterns. | | Dependencies | Notes if effect requires confirmation (e.g., two detectors or pressure switch). | Ignores cause-and-effect chains that interact (e.g., disabling ventilation for smoke control but overriding for sprinkler flow). | | Overrides | Clearly states manual overrides (e.g., firefighter’s switch). | No mention of overrides – leads to unsafe manual control later. |
Automatically alerting the monitoring station or local fire dispatch.
These are the triggers, such as a smoke detector activating, a manual pull station being tugged, or a sprinkler flow switch tripping.
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