Design Safe

User Task Hazard Cause/failure mode Severity Exposure Probability Risk Level Risk Reduction Methods Severity Exposure Probability Risk Level Person Responsible Status
general public All Tasks entanglement Entanglement in straps Minimal Remote Possible Low Simplification of straps Minimal None Negligible Low Whitney TBD
general public All Tasks friction / abrasion Friction from shoulder straps Minimal Occasional Possible Moderate Line rubber with cloth and wear undershirt Minimal None Negligible Low Whitney In-process
general public All Tasks wear Normal Use Slight Remote Possible Moderate Limit use to during workday Slight Remote Possible Moderate User TBD
general public All Tasks fatigue Strain gage overuse Serious Remote Possible Moderate Find strain gages appropriate for more elastic materials Minimal None Negligible Low AJ In-process
general public All Tasks pinch points adjustable velcro straps Slight Occasional Possible Moderate Simplification of straps Minimal None Negligible Low Whitney TBD
general public All Tasks unexpected start User is not prepared Minimal Remote Unlikely Low User awareness of "start" Minimal None Negligible Low Kristen In-process
general public All Tasks normally live parts(direct contact) Exposed electronic and battery components Serious Remote Unlikely Moderate Insulation Minimal None Negligible Low All In-process
general public All Tasks parts live from fault condition(indirect contact) Electronic malfunction Serious Remote Unlikely Moderate Simplification of wire design, insulation Minimal None Negligible Low All In-process
general public All Tasks insulation Overheating, resistance Serious Remote Negligible Low High quality insulation Minimal None Negligible Low All TBD
general public All Tasks inadvertent contact External perturbation Slight Remote Unlikely Low Encasing sensors Minimal None Negligible Low All In-process
general public All Tasks water / wet locations Shock user Serious Remote Unlikely Moderate High quality insulation and wear indoor Minimal None Negligible Low All TBD
general public All Tasks electrical noise External electronics Minimal None Unlikely Low High quality insulation Minimal None Negligible Low All TBD
general public All Tasks unexpected start up / motion User is not prepared Minimal Remote Negligible Low Clear power button Minimal None Negligible Low Kristen TBD
general public All Tasks controls / control systems Electronic malfunction Slight Remote Negligible Low Insulation, mechanical testing of components Minimal None Negligible Low Kristen In-process
general public All Tasks human machinery mismatch Improper fitting of device Slight Occasional Possible Moderate Fitting by professional/clinician Minimal None Unlikely Low AJ In-process
general public All Tasks human errors / behaviors Improper use, ignorace of alarm Serious Occasional Possible High Proper instruction, strong vibration Minimal None Negligible Low Kristen In-process
general public All Tasks personnel fatigue human habit, lack strength Slight Occasional Possible Moderate None; user must strengthen back Slight Occasional Possible Moderate Whitney Complete
general public All Tasks dust Not in use; interferes with electronics; allergies Serious Remote Unlikely Moderate Insulation, meant for daily use Minimal None Negligible Low All On-going
general public All Tasks fatigue / material strength Wear; mechanical failure Slight Remote Unlikely Low Replace of parts/device based on warranty/lifetime Minimal None Negligible Low AJ In-process
general public All Tasks equipment damage Misuse, abuse, aging of device Slight Remote Unlikely Low Use high quality components Minimal None Negligible Low AJ In-process
general public All Tasks stress(mechanical / personal) Frustration with constant alarm Slight Occasional Possible Moderate Appropriate level of alarm Slight None Negligible Low Kristen In-process
general public All Tasks interference with communications Electronic noise Minimal Remote Unlikely Low Filter, insulation Minimal None Negligible Low Whitney TBD
general public All Tasks strength Change in material properties Slight Remote Unlikely Low Replacement of parts, new device Minimal None Negligible Low All On-going
general public All Tasks toughness Change in material properties Slight Remote Unlikely Low Replacement of parts, new device Minimal None Negligible Low All On-going
general public All Tasks work rules Safety conflict Slight Remote Unlikely Low Higher safety in workplace Minimal None Negligible Low All On-going
general public All Tasks peer pressure Social discomfort Slight Remote Unlikely Low Inconspicuous material, small electronics Minimal None Negligible Low All In-process