käytettävyydeltä

käytettävyydeltä is a Finnish linguistic form used to express “in terms of usability” or “from the usability perspective.” It stems from the noun käytettävyys (usability) with the elative suffix, and it is used to indicate the criterion or dimension by which something is evaluated. In practice, Finnish writers use phrases such as käytettävyydeltään parempi or käytettävyydeltä huonompi to compare products, interfaces or services according to their usability.

The expression is common in discussions of user experience (UX), usability engineering, and product specifications. It functions as a comparative or evaluative marker rather than as a standalone measure; the underlying assessment of usability often draws on aspects such as learnability, efficiency, error tolerance, memorability, and user satisfaction, sometimes in line with ISO 9241-11 definitions of usability (effectiveness, efficiency, and satisfaction).

Usage notes include that the form can appear in various constructions depending on emphasis. While käytettävyydeltä and käytettävyydeltään are both used, the choice of form should suit the sentence and ensure clarity in what dimension is being referred to. The phrase is typically employed in comparative statements about products, interfaces, services, or designs.

Related Finnish terms include käytettävyys (usability), käytettävyystestaus (usability testing), käytettävyysarviointi (usability assessment), and käyttäjäkokemus (user experience). The concept of usability itself is cross-disciplinary, encompassing design, psychology, and ergonomics, and is often described with respect to usefulness, ease of use, and user satisfaction.