Principle 5:   TOLERANCE FOR ERROR

The design minimizes hazards and any negative consequences of accidental or UNintended actions.

With universality, it's IMpossible for products and the places they're used to be UNsafe. Things are in order (most-used items placed where easiest to reach) to limit mistakes, and dangerous parts are covered or removed. During use, they also require your attention--in case your mind tends to wander.

For example:

  • G-O-CUP with a handG-O-CUPThe G-O-CUP is disposable, made of recycled paper fiber, with the lid held by three oversized grab hooks that fit into the cup rim. The cup reduces hazards with its large, highly visible side seam and open rim band that act as COOL zones for the user's thumb and fingers. The recessed lid acts as a splash guard for hot liquids, and there's no need to push in or tear off a tab to drink.

    Designer: Timothy C. Johnson, Tim Johnson Design, Inc., Boston, MA.


  • The LIGHTHOUSE BUILDING design avoids accidents by having automatic sliding entry doors next to the exterior wall, with a handrail to separate the IN and OUT traffic lanes. They can serve as convenient safety and wayfinding features, as well as provide optional assistance and organize the traffic flow.

    Designers: Steven M. Goldberg and Jan Keane, Architects, Mitchell/Giurgola Architects, New York, NY.

    Lighthouse handrail separating in/out trafficA man in a wheelchair at a lighthouse