1. February 20, 2013 David Alvarado Ethan Kruder Kirk Santure Jessica Spoll

2.  Initial Problem Statement  Customer Needs Assessment ◦ Hierarchal Customer Needs ◦ Pairwise Comparison Chart ◦ Weighted Hierarchal Customer Needs  Revised Problem Statement  External Search ◦ Product Dissection ◦ Patent Search ◦ Product Archaeology ◦ Benchmarking  Concept Generation ◦ Morphological Charts ◦ Pugh Charts / Concept Selection  Final Design

4. Revised Problem Statement: Our mission is to redesign an electric toothbrush so that it is sustainable and consumer friendly. According to the customer assessments, it is important that the toothbrush have a rechargeable battery and be somewhat lightweight. It is also important that the bristles be uniquely designed to be better at cleaning teeth and increasing dental hygiene. Our design will also aim to improve the grip, and to make it more ergonomic and user-friendly.

5.  To aid our redesign process, we collected external research: ◦ History of electric toothbrushes on the market ◦ Cost of other products on the market ◦ Patented features already in existence  We completed benchmarking tables with information about features of other electric toothbrushes on the market: ◦ Battery life ◦ Noise level ◦ Bristle Design ◦ Grip

6. FeatureOralB (our toothbrush)Crest SpinbrushColgate MotionPhillips Sonicare Battery life / Power41 days – batteries53 days - batteries65 days - batteriesRechargeable battery Noise level70 dB22.25 dB86 dBVery loud (unknown specifics) Bristle designSmall oscillating circleBlue color signal bristlesSmall oscillating circle plus large brush Larger brush head for whitening and removing plaque Cost16.99$14.90$6.99$99.95$ Grip/ComfortBlue rubber gripVaried color rubber gripsGreen rubberWhite and light blue plastic FeatureOralB (our toothbrush)Crest SpinbrushColgate MotionPhillips SonicareCategory Weight Battery life / Power123540% Noise level352110% Bristle design234535% Cost545110% Grip/Comfort33245% Total score (weighted)2.052.93.44.15 Rank4321 These charts helped us determine which features made other existing toothbrushes successful, and thus were used to help us with our concept generation.

7. Dual action head Outside spins clockwise, inside spins counter clockwise Split head design Inner circle of bristles oscillate Intricate bristle design rotates clockwise Inner and outside section oscillate independent of each other

8. Grip has space on back for fingers Grip design provides space for thumb and index finger Toothbrush shape is wide in the middle and tapered at the ends Finger grips on the side enhance ability to grip toothbrush Basic electric toothbrush design with a curved grip and square bottom Design similar to non-electric toothbrush, very skinny and easily fits in your hand

9. Conveyor belt system constantly spins head in one direction Drive shaft system, the wheel on the bottom will rotate causing the brush head to spin Motor with a piston that fires vertically causing the brush head to oscillate Servomotor will spin the head and then return to its original position Magnetic drive shaft, magnets will push and pull drive shaft connected to brush head Pulley system will allow cables to twist brush head

10. USB charger, plugs into outlet and bottom of toothbrush Multiple battery packs that can be easily removed and put on charger Charger that is powered by solar panel Charger is connected to hamster wheel for unlimited power source Charging station allows for storage and charging of battery Charging basket provides a place to wirelessly charge toothbrush and store toothpaste

14. Brush Head Design Iteration 1Iteration 5 SustainabilityPortabilityUser-FriendlySumRankSustainabilityPortabilityUser-FriendlySumRank Weighting0.2620.1260.611 Weighting0.2620.1260.611 Concepts 1---061-0002 2-100.12652-1-0.4854 3-010.61123-0-0.1263 4-0-0.61174-1-0.4854 5-10.48545---02 6-010.61126-01 1 7- -0.73787-0-0.6115 8-110.73718-0-0.6116 Iteration 2Iteration 6 Concepts 1-010.61121-0002 2---032-1-0.4853 3-10.48543-0002 4-010.61124-1-0.4853 5-010.61125-01 1 6-110.73716---02 7-00037-1-0.4853 8-00038-1-0.4853 Iteration 3Iteration 7 Concepts 1-00031-010.6112 2-1-0.48542-0004 3---033-10.4853 4-100.12624-010.6112 5-01 15-110.7371 6-010.61116-110.7371 7-100.12627---04 8-10 28-0004 Iteration 4Iteration 8 Concepts 1-10.48521-010.6112 2-00042-0004 3-10.48523-10.4853 4---044-010.6112 5-10.48525-110.7371 6-11 16-11 1 7-100.12637-0004 8-10 38---04

15. Iteration 1Iteration 5 SustainabilityPortabilityUser-FriendlySumRankSustainabilityPortabilityUser-FriendlySumRank Weighting0.2620.1260.611 Weighting0.2620.1260.611 Concepts 1---04111-0.23 2110.7472211111 311111311111 411111411111 5 10.22335---02 6 5600002 700004710 -0.34 Iteration 2Iteration 6 Concepts 11 -0.7473111111 2---02211111 300002311111 411111411111 5 4500002 6 46---02 7 1 -0.7473711111 Iteration 3Iteration 7 Concepts 1 3100004 20000221 10.752 3---02311111 411111411111 5 35 010.353 6 36 5 7 37---04 Iteration 4 Concepts 1 2 2 2 3 2 4---01 5 2 6 2 7 2 Energy Mechanism for Brush Head

16. Iteration 1Iteration 5 SustainabilityPortabilityUser-FriendlySumRankSustainabilityPortabilityUser-FriendlySumRank Weighting0.2620.1260.611 Weighting0.2620.1260.611 Concepts 1---041110.4751 21110.999121000.2622 30100.12633110.4751 4010.485240 -0.7375 51 -0.47575---03 600-0.26266110.4751 71 -0.475771 -0.4754 800-0.126581000.2622 Iteration 2Iteration 6 Concepts 11000.262210110.7371 2---0421 -0.4756 31010.873130010.6112 40 -0.7377400-0.1265 51 -0.475551 -0.4756 6000046---04 71 -0.475571 -0.4756 80100.126381100.3883 Iteration 3Iteration 7 Concepts 10110.73711110.4751 20010.61122110.4751 3---053110.4751 400-0.126640 -0.7375 51 0.475351 -0.4754 6000056110.4751 71 0.47537---02 81100.3884810-0.1363 Iteration 4Iteration 8 Concepts 11110.999110110.7371 2110.747221000.2622 30110.737331000.2622 4---0640 -0.7376 51 0.475451 -0.4755 60000660100.1263 71 0.475471 -0.4755 81100.38858---04 Power Generation

17. Iteration 1Iteration 5 SustainabilityPortabilityUser-FriendlySumRankSustainabilityPortabilityUser-FriendlySumRank Weighting0.2620.1260.611 Weighting0.2620.1260.611 Concepts 1---04111111 211111211111 31 -0.4755311111 411111411111 50 -0.73765---04 60010.611261100.3883 70100.126370110.7372 8 7800 -0.6115 Iteration 2Iteration 6 Concepts 1 4100002 2---02211111 31 -0.475331 -0.4753 411111411111 5 45 4 6 46---02 7 4700002 8 48 4 Iteration 3Iteration 7 Concepts 1110.4752100-0.1264 2110.4752211111 3---0331000.2622 411111411111 5 45 6 6 4600003 7 47---03 8 480 -0.7375 Iteration 4Iteration 8 Concepts 1 4111111 2 00-0.2622211111 30 -0.7373311111 4---01411111 5 4500003 6 4611111 7 470110.7372 8 48---03 Body Design and Human Factors

18.  We averaged the rankings from each iteration to get the top ranked concept in each category to get our final design.

19. For the head we have an alternating rotation of the bristles. Outside bristles rotate in the opposite direction of the inside bristles. The body features an ergonomic handle built for comfort. It comes with a charging base that can be plugged into the wall. The toothbrush is powered by a servomotor which spins the head of the toothbrush.