Wearable Interface 3

Agenda Introduce Team Team Values Problem Statement Use Scenario Customer Requirements Engineering Requirements Risk Management Project Planning Questions & Comments

Team Introductions Name Major Role Willow Baker ME Project Manager Alice Fischer CE Technical Writer Vincent Yu IE Lead Purchaser Sarah Kordiyak EE Fabricator Nick Breeman EE PCB Lead Designer Tim Preskenis BME Facilitator Jonathan Hoey EE Lead Engineer

Team Values Punctuality Communication Being open to other ideas Speaking up if confused Doing assigned work Sharing ideas if you have them Respect each other and the project Honesty Check in regularly

Problem Statement Project Description Current State Desired State Phones are something that require full attention to interact with, causing people to be distracted when using them. If the person is walking while using their phone this can be a problem. The idea of this device is to allow the user to be paying attention to their surroundings and have their hands free while still be interacting with their phone through a device worn on one hand that is used to input commands through certain motions. Current State Prototypes that were created in previous years that are too large, uncomfortable, and do not work very well. Desired State The device should be small, comfortable, and respond well to the inputs it is given without being too distracting to the wearer. Project Goals Decide on a sensor type Going through the older model and seeing what is usable

Use Scenario

Customer Requirements We separated customer requirements into categories and assigned them each an Importance ranking. We also assigned a Feasibility rating that denotes how confident we as a team feel about our chances at accomplishing that task. Each of these uses a 1-3-6-9 scoring system with 9 being very important / very feasible. Priority is an additive combination of these scores, and serves as an overall score that we can organize requirements with. For example, SF2 pertains to battery protection circuits. This is very important to ensure the safety of the user and product, and is also very simple to integrate, so it gets a maximum Priority of 18. The primary customer needs boil down to the categories shown. Functionality and performance fall under electrical engineering, while durability and comfort are on more of the biomed / mechanical side of things. Aesthetic design is also something to be considered, as this is a product that aims to be a consumer device, and competition already exists.

Engineering Requirements rqmt. # Importance Source Engr. Requirement (metric) Unit of Measure Marginal Value Ideal Value Direction of Improvement ER1 9 CV7 Communication Delay ms 300 100 Minimize ER2 6 CV6 Battery Life hr 8 Maximize ER3 1 CV3 Recharge Rate 2 Minimize* ER4 3 CV4,CF2 Weight oz. 20 14-16 ER5 CV4, CF2, CF3 Vertical Profile mm 12 ER6 CF3, CF5 Adjustability Range of inches 8" to 10" 6" to 12" ER7 CV5,CF1 Comfort ER8 CV2, FN4 Amount of possible controls Number of inputs 27 70 ER9 DR2,SF4,DR1 Durability J / m² ER10 CF4 Removal / Equip time s. 30 5 *Charging faster than 1C can be dangerous The qualitative customer requirements are translated into quantifiable engineering requirements here. Each requirement here refers to the corresponding customer requirement and gives some rough numbers about what we think we can realistically accomplish (Marginal Value), what we hope to accomplish (Ideal Value), and the direction we should be working towards. These are also given a 1-3-6-9 Importance rating based on the customer requirement importance ratings and how we as engineers view the severity of each issue.

Risk Management https://docs.google.com/spreadsheets/d/1V3HGLrmImYn-ShXHnaZ-S27f1QRiv9EzSqq_IOD-y0A/edit#gid=0

Project Planning

Questions or Comments?