1. Team Goals for Phase 2. Functional Decomposition 3. Benchmarking - - PDF document
P17046: The Overcomer Lower Extremities Problem Definition Review Agenda 1. Team Goals for Phase 2. Functional Decomposition 3. Benchmarking 4. Morphological Chart 5. Concept Selection 6. Feasibility 7. Systems Architecture 8. Design
Contain Position Chair Rail Ramp Electromagnet Spring Position Device Lever Affect Trajectory Affect Rotation Piston Hand Crank Capture Wheel Energy Electromagnet Physical Contain Grab Battery Lift Power Wheelchair Position Chair Position Attachment Electromagnet
B umpers Power Wheelchair
Physical None- Only move between passes Electromagnet Lever Spring Servo Power Outlet Clamp Vacuum Spear Magnet Alignment Pins Friction Friction Strength Tape Attachment Strength Weld Spin Lever & Hinge Servo Motor Solenoid Magnet Device Move Adjust Height Hands Adjust Length Chair Move Adjust Angle Harpoon Harpoon Device Attachment Harpoon Harpoon Servo Spring B umpers Position Attachment Lever Servo Universal Joint Gravity B umpers All Dimension Screw Spring
Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 Capture to Move Contain Spring Vacuum Magnet Spring Magnet Servo + Lever Lever Magnet Harpoon Move to Hold Physical Chair Chair Physical Physical Chair Servo + Lever Physical Device Harpoon Orientate to Receive Position Chair Position Attachment Electromagnet Chair Position Attachment Chair Position Chair Bumper Magnet Harpoon Capture to Receive Contain Grab Lift Magnet Grab Magnet Servo + Lever Grab Magnet Harpoon Power to Send Power Wheelchair Physical Capture Wheel Energy Battery Hand Crank Battery Battery and Spring Physical Battery Spring Aim to Send Position Chair Affect Trajectory Bumper Chair Position Atachment Chair Server + Lever Chair Servo Universal Joint Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 3 Easy to Use
S S + + +
S 1 Cheap + +
+ +
3 Manufacturable S S S S
S + S + 1 Ball Speed
+ + + + +
+ 2 Capture Radius
S
+
S 1 Power Required + +
2 Existing Parts Used S S S S S S S + + + 3 Achievable Within Timeframe + + S S + + S + + + 3 Environment/User Safety S S + + S + + +
S S S + S S
3 4 1 1 3 5 4 5 4 6 total - 4 3 2 2 4 1 4 3 2 2 total S 2 2 5 6 2 3 1 1 3 1 Total Weighted Value 31 42 40 40 38 51 47 36 48 46 Selected Concept to persure Concept 6 wins the Pew Values, but Concept 9 is an "improvement" on this design so both will be moved forward Concept 7 is a good second
dependant on magnets
Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 Aim to Bowl Hinge and lever Gas Motor Lever Move Chair Move Chair Servo Lever Move Chair Magnet Move Chair Send to Bowl Ramp Spring Piston Rail Gravity Rail/Magnet Rail/Lever Ramp Magnet Lever/Bumper Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 3 Easy To Use + + + S + + +
S 1 Cheap +
+ +
+
3 Manufacturable + S S + + S S +
2 Exisiting Parts
S S S S S S 2 Accuracy S + + S S + + S +
S S S S S S S S S S total + 3 2 2 2 3 1 2 2 1 1 total - 1 1 1 1 1 1 2 1 total S 2 3 3 3 3 4 4 3 3 4 Total Weighted Value 33 34 31 32 35 32 34 29 29 27 Selected Concept to persure Concept 5 cannot be used by someone with a profound handicap, so it is not feasible Concept 7 is an improvement
existing prototype and is very possible
Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Mount to Attach Alignment Pins Magnet Magnet Clamp Clamp Spring + Clamps Clamps + Screws + pins Adjust to Attach All Dimension Adjust Height All Dimension All Dimension Adjust Height All Dimension All Dimension Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 3 Easy to Use + + + S S +
Cheap S S
+ + S 3 Manufacturable S S S + + S S 2 Adjustability S S + + S + + 2 Existing Parts Used S S S S S S S 2 Design Simplicity
+
Breakaway Ability S + + S S +
+ + + + + + + total + 2 2 3 3 3 4 1 total - 1 1 total S 4 4 2 3 3 2 4 Total Weighted Value 38 43 40 43 43 42 33 Selected Concept to persure Concept Number 2 works as a relatively simple way to mount the attachments Concept 5 is more adjustable and still scores the same as Concept 2, so it must be taken into the next stage
Team #: P17046 Team Name: Date: 02OCT16 Doc Owner: Revision #: 4 ID Risk Item Effect Cause Likelihood Severity Importance Action to Minimize Risk Owner 1 Attachment Fails to Perform desired functions - Technical risk Delay in timeline, due to necessary redesign Product is not acceptable for use 2 9 18 Reduce the risk of damage/injury by designing with this concern in mind and marking sure each concept performs all required functions Jason 2 Budget – Resource Risk Insufficient Funds for Project Ordering the wrong parts, constraining to expensive items 3 3 9 Carefully outlining purchasing expenses, monitoring BOM’s (Reduce). Chris 3 Time – Resource Risk Project doesn’t get done, milestones aren’t met, incomplete demonstration Poor time management, lack of communication 2 9 18 Follow Gantt chart and personal plans (Prevent.) Chris 4 Liability issues preventing interviews with children - Resource Risk Missing a specific, but important CR Not jumping through the bureaucratic hoops properly or soon enough 3 6 18 Make sure to get the balls running as early as possible, and work with OUE team to streamline process and to get better questions (Reduce). Josh 5 Manufacturing issues - Technical Risk Project goals are not met, delay in schedule Poor Design Selection, poor communication with supplier, supplier is as capable as they claimed 2 9 18 Follow the MSD process and be sure to make thoughtful choices when it comes to concept selection (Reduce). Stay in touch with proposed supplier to make sure we are designing within their means of productions Chris 6 Attachment - Safety Risk Users get hurt Bad design, weak testing criteria, bad benchmarking, poor testing procedure 1 9 9 Make a detailed and forgiving project plan (Reduce). Josh 7 MSD Team has only three members - Resource Risk More work for each team member Could cause delay in scheduling compared to MSD schedule team failing to complete all customer requirements 3 6 18 Accept responsibility as individuals and be sure to establish good team norms (Reduce). Chris 108 Severity scale 1 - The impact on the project is very minor. We will still meet deliverables on time and within budget, but it will cause extra work 2 - The impact on the project is noticeable. We will deliver reduced functionality, go
Engineering Specifications. 3 - The impact on the project is severe. We will not be able to deliver, or what we deliver will not meet the customer's needs. Accept Action will be taken to prevent the cause(s) from occurring in the first place. Action will be taken to reduce the likelihood of the cause and/or the severity of the effect on the project, should the cause occur Action will be taken to transfer the risk to something else. Insurance is an example of this. You purchase an insurance policy that contractually binds an insurance company to pay for your loss in the event of accident. This transfers the financial consequences of the accident to someone else. Your car is still a wreck, of course. Low importance risks may not justify any action at all. If they happen, you simply accept the consequences. 2 - This cause could conceivably happen 3 - This cause is very likely to happen Prevent Reduce Transfer Overcomer - Lower Extremity Jason Constant Likelihood scale 1 - This cause is unlikely to happen Total “Importance Score” (Likelihood x Severity)