A design for extremes strategy develops a product around the needs of users at one or both ends of a user range, rather than around an average user. If the solution also works for people between those extremes, it can create a more inclusive design.
In IB Design Technology, an extreme is a user at the limits of the intended population. These limits may involve body dimensions, strength, mobility, sensory ability, cognition or the conditions in which a product is used.
Apply the strategy by:
- Identifying the relevant user characteristic and its full range.
- Studying the needs of users at the extreme through observation, interviews, anthropometric data and user trials.
- Developing and testing features that meet those demanding needs while remaining effective for the wider population.
| Extreme considered | Possible design response | Wider inclusive benefit |
|---|---|---|
| Very limited grip strength | Large, soft, non-slip handle | Greater comfort and control for most users |
| Very short and very tall users | Adjustable working height | Improved posture across a broad user range |
| Low vision | High contrast, clear type and tactile controls | Faster identification in poor lighting |
A kitchen utensil with a thick, cushioned handle designed for someone with arthritis is a typical example. The handle reduces the grip force and precise finger movement required, while improving comfort during repetitive tasks.
A common misconception is that design for extremes means producing a specialist product only for an extreme user. Instead, extreme needs generate features that can improve accessibility and usability for the whole target market. Designing for one extreme does not automatically accommodate the opposite extreme, so testing across the intended population remains necessary.
In an IB exam response, define the strategy, identify an extreme user, explain the design feature, and link it to a broader group. Avoid calling the product “accessible”; explain how the feature reduces a barrier within inclusive design.
