Terms for subject Microsoft containing use case

English	Russian
use case	вариант использования (A collection of scenarios which make up a behaviorally related sequence of interactions that a user performs in a dialog with a system)
use case diagram	схема вариантов использования (A diagram that shows the external actors who will interact with your system and how they will use it. The diagram consists of a system boundary, actors, use cases, and use case relationships (communicates, uses, and extends))