The functional and physical nature of a technological outcome.
• Functional attribute: What an outcome, or part of an outcome, does – for example, "provides grip", "stores water", "joins surfaces".
• Physical attribute: A spatial or sensory aspect of a technological outcome. Physical attributes describe how the outcome looks and feels – for example, "hard", "salty", "spherical", "loud", "luminous", "big".
Attributes differ from specifications in that specifications define the physical and functional nature of the technological outcome in a measurable way. For example, an attribute may refer to the outcome being small enough to be comfortably held, whereas the specification would give the precise measurement in terms of length, width and depth.