noun
operability; usability; user-friendliness
Refers to how easy or intuitive a device, software, or interface is to operate. Often used in technical and product contexts.
このアプリは操作性が良く、誰でもすぐに使える。
This app has good usability, and anyone can start using it right away.
操作性を向上させるために、UIを改善した。
We improved the UI to enhance operability.
ユーザビリティ is a direct loanword for usability, common in IT and design fields, whereas 操作性 is a native compound with a broader sense of operability.
Compound of 操作 (operation, manipulation) + 性 (nature, -ity). The exact historical derivation is uncertain, but the word follows a common pattern for forming abstract nouns from verbs.