Design for the edge

you are in this shape if

• 'Special needs' versions cost more and work less well
• The average the design targets describes almost nobody exactly
• Workarounds invented by excluded users are spreading on their own

the moves

Design for the hardest case

Build for the user with the least grip, sight or mobility; the mainstream inherits a better product.

Add, don't fork

Make the accessible version an attachment or a layer over the standard product instead of a separate line.

Adjust the system, not the person

If nobody fits the fixed design, make the design adjustable — the cockpit, not the pilot.

where it was solved

1. 1950US Air Force (Lt. Gilbert S. Daniels)Aviation / ergonomicsIn 1950, Lieutenant Gilbert S. Daniels measured 4,063 Air Force pilots across the ten body dimensions most relevant to cockpit fit — height, chest circumference, arm length and similar measures — and checked how many pilots fell within a normal range of the average on all ten simultaneously, rather than just on any single dimension. He found essentially none did.The finding that no pilot was actually 'average' across the dimensions that mattered discredited the practice of designing a cockpit around a single average body, and the Air Force mandated that manufacturers build adjustable seats, pedals and harness straps so the cockpit could be fitted to each individual pilot rather than the reverse. Aircraft mishap rates fell sharply over the following two decades, from roughly 23.6 to 4.3 per 100,000 flying hours by the late 1960s, alongside broader safety and training improvements.
2. 1971Rolling Quads / City of BerkeleyUrban planning / disability policyOrganized as the Rolling Quads, disabled Berkeley students including Ed Roberts and John Hessler altered a handful of the curbs that mattered most to them directly — accounts differ on how covert or extensive this was, with at least one participant later describing the 'midnight commando' version of the story as exaggerated — and brought the demand formally to the Berkeley City Council. On September 28, 1971, the council adopted what is credited as the country's first municipal curb-cut policy, and the city installed its first official ramp on Telegraph Avenue the following year.Berkeley's program became the template other cities pointed to; curb cuts spread nationally through Rehabilitation Act enforcement later in the 1970s and were made a legal requirement across the United States by the Americans with Disabilities Act, signed in 1990.
3. 1990OXO InternationalConsumer housewaresSmart Design's team, led by Davin Stowell and Dan Formosa, researched arthritis and grip mechanics directly, then built the Good Grips peeler around an oversized, soft, black rubber handle with flexible fins that distribute pressure across the palm instead of concentrating it on fingers — one design, sold as a single mainstream product at a premium price, not a medical accommodation sold at a discount to a narrower audience.Good Grips became a mainstream retail success rather than a niche accessibility product — OXO grew to over 1,000 products across kitchen, cleaning and storage categories, and the company's annual sales exceeded $100 million by the time Helen of Troy acquired OXO International for $273 million in 2004; the original peeler was later ranked 6th among the 100 most important designs in history by Fortune and the IIT Institute of Design.
4. 2011MyShelter Foundation (Illac Diaz), building on Alfredo Moser's inventionOff-grid energy / social enterpriseIllac Diaz's MyShelter Foundation, an NGO in the Philippines, turned Moser's bottle-bulb into a scaled social enterprise starting in April 2011: rather than distribute the bottles as free aid, it trained and paid local community members to assemble, install and maintain them under a local-entrepreneur business model, installing 15,000 solar bottle bulbs across twenty Philippine cities within months of launch, then open-sourcing the design and technique so other organizations worldwide could replicate the same installation-and-livelihood model.The initiative deployed over 200,000 bottle bulbs globally within its first year and had reached roughly 1 million homes across multiple continents by 2015, with active programs in more than 25 countries from Argentina to Zambia; Brazil's own branch, working in the country where the original invention began, had by itself reached over 20,000 people through more than 3,700 installations across some 120 communities. Each bottle delivers daylight-hours illumination roughly equivalent to a 40–60 watt incandescent bulb and typically lasts about five years installed.
5. 2019IKEA Israel (with Milbat and Access Israel)Retail / furnitureRather than manufacturing and shipping the add-ons as a physical retail product, IKEA released 13 of them as free, downloadable 3D-print files that any customer with access to a 3D printer — or a local maker space, library, or accessibility organization with one — could print and install themselves, immediately, on furniture they already owned, without waiting for a redesigned product to reach a store shelf.The files were downloaded and printed in 127 countries, and IKEA Israel reported a 37% sales lift on the specific 'adapted' products the add-ons targeted, alongside a Cannes Lions Grand Prix in Health & Wellness; the project also entered the Design Museum's Beazley Designs of the Year list the same year.
6. 2020The LEGO Foundation / LEGO GroupToys / educationRather than design and manufacture a standalone braille-teaching device, LEGO adapted its own existing brick geometry and injection-molding tooling to encode braille directly into a fully compatible LEGO piece — buildable, stackable, and playable with the billions of ordinary bricks already in circulation worldwide, and usable identically by blind and sighted children in the same play session rather than in parallel, separate activities.LEGO Braille Bricks launched in seven countries in August 2020 (Brazil, Denmark, France, Germany, Norway, UK, USA) with immediate plans to reach twenty countries across eleven languages by early 2021, distributed free to schools and organizations for the blind rather than sold as a retail product, following pilot testing conducted over nearly two years across five countries with blind community input.
7. 2025IDOMED / Instituto Yduqs (agency: Artplan)Medical educationInstead of a diversity campaign, IDOMED, Instituto Yduqs, and Artplan produced a book and short film that adopt the exact visual grammar of a medical textbook — anatomical illustration, typography, dosage charts — to present racism in Brazilian healthcare as a set of diagnosable 'conditions,' built from real patient testimony and research rather than invented anecdotes.Per agency and independent trade-press reporting, the book has been adopted as supplementary teaching material by roughly 32 Brazilian universities, reportedly reaching over 9,000 medical students across 10-plus states, and was shared with Brazil's Ministry of Health — though being shared with the ministry is not the same as an official protocol change, and these figures come from agency and press coverage rather than an independent academic audit. The project became the first Brazilian creative work to win two Cannes Lions Grand Prix, in Industry Craft (2025) and Glass: The Lion for Change (2026).

what breaks in transit

• Accessibility bolted on at the end costs more than designing for it from the start.
• A separate product marks the user it was meant to include.
• Universal design still needs the excluded users in the room; assumptions about them are usually wrong.