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Fire Extinguisher Redesign. Maddie Burke Design Project Management Student Initiated Projects: R12900 Spring 2011-2012. Functional Timeline. INDICATORS SHOW ‘READY TO USE’. INDICATORS CHANGE TO ‘USED’. RELEASES WATER. REFILL CYLINDER WITH WATER.
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Fire Extinguisher Redesign Maddie Burke Design Project Management Student Initiated Projects: R12900 Spring 2011-2012
Functional Timeline INDICATORS SHOW ‘READY TO USE’ INDICATORS CHANGE TO ‘USED’ RELEASES WATER REFILL CYLINDER WITH WATER BOX AUTOMATICALLY PRESSURIZES CYLINDER OF H20 REMOVES SAFETY PIN ACTUATES VALVE REMOVE CYLINDER FIRE REMOVE EXTINGUISHER PRESS TRIGGER RELOAD EXTINGUISHER RELOAD EXTINGUISHER INTO BOX ALARM ON BOX GOES OFF
Functional Flow Decomposition EXTINGUISH REMOVES SAFETY REMOVE FROM BOX CHANGES INDICATORS SPRAYS OUT WATER EMPTY H2O CYLINDER TRIGGER SPRAY FORCE CONVERT FORCE TO OPEN VALVE RELOAD WATER INTO CYLINDER RESET INDICATORS CYLINDER INTO EXTINGUISHER REPRESSURIZE WATER RELOADED EXTINGUISHER RELOAD SAFETY EXTINGUISHER INTO BOX
Benchmarks: Fire Extinguishers • Fire Extinguishers • Materials • Spray time • Size • Weight • Price • Rating • Water amount • Spray range • Constraints • Under 15 lbs • 2.5 gallons of water • Rechargeable • Cost to design
House of Quality Cross Linking • every customer need is met by some engineering specification • Some x-ed off as “related” if not directly dependent on one another
Project Scope Feedback • Staffing: industrial design student would bring a unique set of skills to the design • Safety: there will have to be some sort of testing box in case of explosion of the pressurized vessel during tests • Specifications: intuitive design aspects will be hard to quantify, a wide range of user testing will be needed • Scope: project would include extinguisher design and box design, could be split into different jobs (as shown in the staffing slide) so multiple things can be worked on at once