noun
sphere of action; scope of activity; range of work
Refers to the physical or metaphorical area within which a person, group, or organization operates or is active.
彼の活動範囲は主に関東地方です。
His sphere of activity is mainly the Kanto region.
このプロジェクトの活動範囲を明
We need to clearly define the scope of activity for this project.