Käyttökelpoinen

Käyttökelpoinen is a Finnish adjective meaning usable or fit for use. It is formed from the noun käyttö (use) and the adjective kelpo, with the suffix -inen, and is used to describe objects, methods, procedures, or systems that can be used effectively for their intended purpose. In technical and professional contexts—such as product design, software development, engineering, and regulatory assessments—it signals practical functionality and reliability rather than mere possibility. A käyttökelpoinen laite, ohjelmisto tai menetelmä is one that functions under normal conditions and meets the defined requirements for use; a device or solution that fails to meet these criteria would be described as not käyttökelpoinen.

Käyttökelpoisuus is the related noun referring to the state or quality of being usable or fit for use. It is often considered in usability evaluations, safety checks, interoperability reviews, and compliance processes. Related concepts include käytettävyys (usability), which focuses on the ease and efficiency of use, and toiminnallisuus (functionality) or luotettavuus (reliability). The term is commonly used in Finnish technical writing to assess whether a product, system, or method meets practical requirements for real-world use.