Integrated System Build & Test with Customer Demo
Table of Contents
Team Vision for System Level Demo with Customer
- The project plan as of this review can be found here.
SummaryThis phase our team planned to perform testing that would show that the wheelchair met all customer requirements. Testing was performed, and improvements to the chair were made, but the chair still does not meet customer requirements.
Test Results Summary
|Engineering Requirement||Target Value||Acceptable Threshold||Customer Requirement||Test||Test Result||Test Conclusion||Expected Test Result|
|Speed (mph)||7||5||Increased Speed||Speed Test 1.1||2.92||April 12, 2017||6|
|Speed on grass terrain (mph)||5||4||Ability to cover diverse terrain||Speed Test 1.3||0.85||April 12, 2017||4.7|
|Speed on grade (access ramp) (mph)||4||3||3 Geared Hub||Speed Test 1.2||1.50||April 12, 2017||3.4|
|Force to move (lbs)||15||20||Ability to cover diverse terrain||Force Test 1.1, Force Test 1.2||4||April 12, 2017||9|
|Weight of prototype (lbs)||50||70||Easy maintenance||Scale||44||April 4, 2017|
|Prototype cost ($)||1200||1200||Reasonable Pricing||Monitor budget for parts, monitor time for assembly||928.73||1100|
|Material cost ($)||900||1000||Reasonable Pricing||Monitor budget for parts||339.17||800|
|Shift Deflection (deg)||5||10||Shift Simultaneously||Deflection Test 1.1||Negligible||April 12, 2017|
Width testing was a success.
- The test matrix can be found here.
- All test plans can be found here.
Risk and Problem Tracking
|Chair not done on time.||Not enough slack time for setbacks.||Lower grade||1||9||9||Have a detailed project plan with slack time.|
|Don't meet test results.||Chair doesn't work as expected.||Customer requirements are not met.||9||3||27||Allow time for retesting and rework.|
|Imagine RIT request denied.||RIT either can't or won't give us space.||A different exhibit will be needed.||0||1||0||Have alternate exhibit ideas.|
|Chair breaks.||Too much force on the chair.||Chair will have to be fixed, costing time and money.||3||9||27||Test Alexa in the chair first and try not to stress the chair.|
|Shifting does not work properly.||Shifting test did not adequately reflect reality.||Will not meet engineering requirement.||3||9||27||Test shifting and work on calibration until it works properly.|
|Gear hub breaks.||Overuse and improper use.||Chair will not function properly.||3||9||27||Fix or buy new, as needed.|
|Master link gets lost during testing.||Too much stress on chain.||Chain falls off.||3||3||9||Find lost link or buy new.|
|Wheelchair doesn't function properly for Imagine.||Wheelchair breaks.||People cannot demo chair.||6||6||36||Explain concept without demo.|
- The risk file is available here.
- The updated problem tracking is available here.
- Current Tech Paper
- Updated Budget
- Updated BOM
- Operator's Manual
- Updated CAD files
- Assembly Instructions.
Plans for next phase
For the next phase we plan to develop possible solutions/improvements for the chair that could be worked on by a future MSD teams.
- Our individual 3-week plan can be found here.