{ "format": "OpenFMEA", "version": "1.0", "type": "FMEA", "meta-data": { "title": "", "application": "sbdl", "application_version": "1.27.12", "cmd_line": "['/home/nihil/Work/FMEA/sbdl/sbdl.py', '/home/nihil/Work/FMEA/sbdl/deploy/example/elevator_model.sbdl', '-m', 'openfmea', '-o', '/home/nihil/Work/FMEA/sbdl/deploy/example/elevator.fmea', '--set-config', 'sbdl_warn_new_config', '0', '--set-config', 'plantuml_generate_footer', '0']", "date": "2026-09-27T22:48:31", "user": "nihil", "system": [ "Linux", "mithras", "7.0.0-31-generic", "#31~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Aug 10 09:38:02 UTC 2", "x86_64", "x86_64" ] }, "fmea": [ { "key": "000", "aspect": "Cabin door mechanism and sensors", "requirement": "The door system shall detect an obstruction and reopen within 250 ms", "mode": "Cabin door fails to open at a floor", "effect": "Passenger is unable to leave or enter the cabin", "cause": "Door drive motor failure or mechanical jam", "control": "Scheduled preventive maintenance on the door drive motor; Monthly door obstruction test: block the light curtain while closing and confirm the doors reopen", "detection": "Door position sensor confirms open/closed status on every cycle (The door system shall detect an obstruction and reopen within 250 ms)", "severity": "8", "occurrence": "3", "occurrence_post": "1", "detectability": "3", "detectability_post": "1", "action": "Add a redundant door position sensor to detect a motor stall; Report a door-open timeout alarm to the building management system", "action_detection": "" }, { "key": "001", "aspect": "Electromechanical holding and safety brake", "requirement": "The safety brake shall engage within 100 ms of an overspeed or free-fall detection", "mode": "Cabin exceeds its rated speed during travel", "effect": "Risk of cabin impact at the shaft end; potential passenger injury", "cause": "Electromechanical brake fails to hold under regenerative conditions", "control": "Annual brake inspection and load test per the EN 81-20 schedule", "detection": "Centrifugal speed governor trips the safety gear on overspeed", "severity": "10", "occurrence": "2", "occurrence_post": "1", "detectability": "2", "detectability_post": "1", "action": "Introduce a dual-redundant brake circuit with independent power supplies; Continuous speed logging with anomaly alerts to the maintenance system", "action_detection": "" }, { "key": "002", "aspect": "Uninterruptible power supply for safety functions", "requirement": "The UPS shall sustain safety-critical functions for at least 1 hour after a mains failure", "mode": "Mains power lost while the cabin is between floors", "effect": "Cabin halts between floors; passengers may be trapped until rescue (UPS sustains a controlled descent to the nearest floor)", "cause": "Unplanned mains supply interruption", "control": "UPS sustains a controlled descent to the nearest floor", "detection": "UPS self-test and mains voltage monitoring with continuous reporting", "severity": "6", "occurrence": "4", "occurrence_post": "2", "detectability": "1", "detectability_post": "1", "action": "Automatic rescue drive: on power loss the UPS moves the cabin to the nearest floor and opens the doors", "action_detection": "" }, { "key": "003", "aspect": "The office elevator serves eight floors with a single cabin and a traction drive. It is decomposed into six subsystems, described below.", "requirement": "The elevator system shall transport passengers between floors safely and efficiently", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "004", "aspect": "The cabin carries up to eight passengers. It holds the doors, the lighting, the display and the emergency phone, and rests on a load cell.", "requirement": "The cabin shall carry a rated load of 630 kg (8 persons)", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "005", "aspect": "The traction motor, counterweight, holding brake and speed governor move the cabin and hold it in place.", "requirement": "The cabin shall level within 10 mm of the floor sill", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "006", "aspect": "Floor call scheduling and cabin dispatch logic", "requirement": "The dispatcher shall minimise average waiting time using collective control", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "007", "aspect": "All passenger-facing controls and indicators: hall call panels on each landing, the cabin panel and the overload indicator.", "requirement": "The elevator system shall provide accessible and intuitive passenger interaction", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "008", "aspect": "Cabin door mechanism and sensors", "requirement": "The doors shall stay open for a configurable dwell time (default 4 s) after a call", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "009", "aspect": "Floor indicator display inside cabin", "requirement": "The cabin display shall show the current floor and direction of travel at all times", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "010", "aspect": "A software controller with two independent parts: the dispatcher that schedules calls, and the safety monitor that supervises every sensor and can stop the cabin on its own.", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "011", "aspect": "The shaft structure with its guide rails, overtravel limit switches and the absolute position encoder.", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "012", "aspect": "Mains distribution and the uninterruptible supply that keeps the safety functions and lighting alive when the mains fail.", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "013", "aspect": "The office elevator serves eight floors with a single cabin and a traction drive. It is decomposed into six subsystems, described below.", "requirement": "The elevator system shall comply with EN 81-20", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "014", "aspect": "Top and bottom overtravel limit switches", "requirement": "Limit switches shall cut drive power on overtravel in either direction", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "015", "aspect": "Load cell under the cabin floor", "requirement": "The cabin shall not depart when the load exceeds the rated capacity", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "016", "aspect": "", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "The brake engages before power is cut and the cabin halts", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "017", "aspect": "", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "A cleared fault returns the monitor to service", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "018", "aspect": "", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "Calls are served in the order received", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "019", "aspect": "Door drive motor and belt", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "020", "aspect": "Infrared light curtain across the door opening", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "021", "aspect": "Cabin interior lighting", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "022", "aspect": "In-cabin emergency communication device", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "023", "aspect": "Traction motor unit", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "024", "aspect": "Counterweight assembly balancing the cabin", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "025", "aspect": "Centrifugal governor that trips the safety gear on overspeed", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "026", "aspect": "Real-time safety interlock monitoring", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "027", "aspect": "Vertical guide rails for cabin travel", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "028", "aspect": "Absolute cabin position encoder on the guide rail", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "029", "aspect": "Hall call buttons on each floor landing", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "030", "aspect": "Destination floor selection buttons inside the cabin", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" }, { "key": "031", "aspect": "Passenger overload warning indicator", "requirement": "", "mode": "", "effect": "", "cause": "", "control": "", "detection": "", "severity": 10, "occurrence": 10, "occurrence_post": "", "detectability": 10, "detectability_post": "", "action": "", "action_detection": "" } ], "layout": {} }