Skreppa The Modular Shoe Detailed Design By Nick

Skreppa - The Modular Shoe Detailed Design By Nick Amato, Mickey Evans, Haley Gallagher, Lydia Yeckley 1

Greetings Project Team - Skreppa (Modular Shoe) Customer - VP Engineers for Sustainable World - Bri Goold MSD Guide - Jerry Adamski Industrial Designers - Noah Flynn & Chris Flemming 2

Agenda 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Purpose Statement Project Objective & Mission Phase Gate Reviews Current Phase Plans Scope Changes Similar vs Dissimilar Materials of each Shoe Last Prototyping Finalizing Test Plans Life Cycle Assessment Comparison MSD II Plan Feedback & Comments

Purpose Statement 20 Billion Pairs of Shoes Made per year ● Fast-changing fashion industry ● 79% of shoes are thrown in landfills ● Americans toss 300 million pairs of shoes per year ● Components aren’t recycled - various components

Project Objective & Mission Skreppa is. . . ● Reinventing how people use shoes ● Using ethically sourced materials ● Enabling wearers to swap components with ease 5

Phase Gate Reviews Phase - Gate Phase Name Date MSD 1 - 1 Problem Definition August 28 th - September 13 th MSD 1 - 2 Systems Design September 17 th - October 11 th MSD 1 - 3 Preliminary Detailed Design October 15 th - November 8 th MSD 1 - 4 Detailed Design November 12 th - December 6 th *Current* MSD 2 - 5 Build & Test Prep Jan - Feb 2019 *Next* MSD 2 - 6 Subsystem Build & Test Feb - March 2019 MSD 2 - 7 Integrated System Build & Test March - April 2019 MSD 2 - 8 Customer Handoff & Final Project Documentation April - May 2019 6

Detailed Design Plan Detailed Design (11/9 - 12/3) ✓ Mid-phase progress report ✓ Complete design output ✓ All design documentation ✓ Complete & up-to-date on EDGE ✓ MSD II plan ✓ (first draft, but with project-specific detail) ✓ Engineering Requirements (complete) ✓ Risk assessment, mitigation plans & triggers ✓ Test plan (complete, addresses all requirements, equipment & procedures defined, traceable to requirements) ✓ Ready to order long lead-time parts and implement the design Project Steps ✓ Finalize mechanism design ✓ Decisions regarding scope ✓ 3 D printing shoe last - cutting template ✓ Project plan for next semester ✓ Bill of Materials Update with Purchases ✓ Finalized test plans ✓ Identify obstacles for MSD II 7

Scope Change From ● 2 upper types, 3 cupsole types, working mechanism To ● Hiking & Flat - upper & cupsole with working mechanism Why? ● Additional complexity with bending requirements ● Different techniques used for different shoes

Similar & Dissimilar Material Report Similar or Dissimilar Technology Material Hiker Cupsole Shank, Harder TPU Mechanism Hooks Tough Fabric Flat Cupsole Softer TPU Flat Upper Canvas Fabric Universal Across Shoe N/A Tightening Ankle Support Hiker Upper Loops N/A Smaller Loops Recycled Water Bottle Shoe Laces Surrounds foot Ankle Support Sitting Higher N/A Sits Lower

Shoe Last ● 3 D Printed via the Construct @ RIT ● Cost approximately $6. 60 to print ○ Premade shoe lasts were $70 or more from an online retailer. ● Used to: ○ Generate upper template ○ Gain perspective on sizing ○ Visualize mechanism ● Sized to a Women’s 8. 5

Mechanism Prototype- Slide Mechanism Slide mechanism on calculator cover served as inspiration for our joining mechanism First pass 3 D print of slide mechanism

Finalized Test Plans Engineering Requirement → Test Plan ● ● ● ● Comfort Scale Comfort for Customer → Comfort Scale (See Image on Right) Outsole Cure Time → Based on average time taken to fabricate Changeover Time → Integrated into comfort scale (+100 Tests) Topsole Fabrication Time → Based on average time taken to fabricate Durability → Based on testing of 50 users Toe Bending Give Test → Simple Scale Testing Required Waterproofing - Submersion Testing 12

Lifecycle Shoe Comparison ● ● Materials have most impact on CO 2 footprint Skreppa values based on construction with non ideal materials

Bill of Materials Update with Purchases Items Description Total Cost Internal or External Vendor Print Prototype Last 3 D Printed Last $7. 00 Internal Construct Natural Rubber Natural Gum Rubber Sheet $20. 36 External MSC Direct Morphable Sheets Thermoplastic for joining and support $6. 71 External Home depot Topsole Sunbrella Cast Shale Outdoor Fabric $19. 98 External Sunbrella Fabric Link Hooking Mechanism 10 in. Mini Bungee Cord (8 -Pack) $2. 87 External Home Depot Joining Material Weldbond Interior & Exterior All. Purpose Adhesive $6. 93 External Home Depot Joining Material Eyelet Plier with 5/32 in. Eyelets (100 Piece) $8. 55 External Home Depot Tightening Material 3 sets of laces - 100% post-consumer, recycled plastic bottles $10. 00 External All Birds Total Purchased $82. 40 External items addressed $77 of material identified (Quick TAT) Mostly internal build items remain

Project Plan for MSD II 1. Build & Test Prep 2. Subsystem Build & Test 1. Integrated System Build & Test 1. Customer Handoff & Final Project Documentation

ESW Winter Presentation

Next Gate Objectives Build & Test Prep (1/15 - ~2/12) ○ ○ ○ MSD I post-mortem MSD II project plan (rev 2) Status long-lead time purchases Test plan (rev 2) Test bench setup Problem tracking in place Project Steps ○ Receive Ordered Items ○ Upper cutting ○ Fabricate female track ○ Fabricate male track ○ Construct prototype ○ Generate physical proof of concepts ○ Concept Refinement ○ Risk & Problem Tracking ○ Pattern/template drawn up for topsole

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