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D-Lab Design for Human Use

D-Lab Design for Human Use. Ergonomics. Ease of use Ease of maintenance Number of interactions Novelty of interactions Safety. Battery Maintenance. Design for as many target users as possible. Consequences of bad design. Ergonomics. Ease of use Ease of maintenance

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D-Lab Design for Human Use

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  1. D-LabDesign for Human Use

  2. Ergonomics • Ease of use • Ease of maintenance • Number of interactions • Novelty of interactions • Safety

  3. Battery Maintenance

  4. Design for as many target users as possible

  5. Consequences of bad design

  6. Ergonomics • Ease of use • Ease of maintenance • Number of interactions • Novelty of interactions • Safety

  7. Micro-Flail Time and Motion Comparison Probing- 2-6 minutes • Set up flail – 15 seconds • Walk away – 90 seconds • Run flail – 10 seconds • Walk back – 90 seconds • Finish operation – 15 seconds • Total ~4 minutes

  8. Charcoal Briquette Making Time and Motion Study Total = ~4 hours

  9. Briquette Making

  10. Original prototype in use

  11. Break process into steps • Load charcoal • Hammer • Eject Briquette

  12. Define the steps • Load charcoal – until hand releases scoop • Hammer – until hand releases hammer • Eject Briquette –until hand releases pin

  13. Time study data(seconds)

  14. Time trial data

  15. What took so long?

  16. What took so long? • Hammering • Pick up hammer • Pick up piston • Insert piston • Hammer • Remove piston • Set down piston • Set down hammer

  17. New designs • No corners in compaction area (no cleaning necessary) • Piston hangs in top of tube (don’t remove and set down piston) • One handed eject door (don’t set down hammer) • Use hammer to open eject door (eliminate the closing pin) • Estimated speed = 5 Briquettes per Minute (BPM) • (old machine 2 BPM) • Alternate design: Two pistons • Estimated speed = 5.4 to 6.6 BPM, depending on the loading method. • Conclusion: second piston is not worth the added complexity

  18. New machine 2.5x faster

  19. New machine time breakdown

  20. More people 5.5x faster

  21. Comparison between machines

  22. Types of time studies: • External: Compare your product to other products to see what the benefits are (or are not). • Internal: See if your product is efficient, and identify the best places for improvements.

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