The phrase "sphere of operation" is correct and usable in written English.
It is often used to describe the area of activity or expertise of a particular individual or organization. For example, "The business expanded its sphere of operation to include online sales."
Its main sphere of operation was the transatlantic shipping trade, but the company also operated services to the Mediterranean.
A theory of infinitely small change takes its sphere of operation as the little, local, personal, fluid, fleshy, experiential.
If trade-mark law does not protect market share in a particular situation, the law of copyright should not be used to provide that protection, if that requires contorting copyright outside its normal sphere of operation.
Bentley said in a statement that "Mulliner's sphere of operation extends from one tiny modification to an otherwise standard car, such as the embroidery of the owner's initials in the upholstery, to the design, commission and execution of a new state limousine for Her Majesty, The Queen".
The robustness and reliability of the design ensured that their sphere of operation was expanded to cover most of the Southern Railway network.
Sangin is the last of the formerly British-controlled towns like Musa Qala, Kajaki and Garmsir to have passed into the American sphere of operations.
"I am a novelist turned temporary adventurer; and I chose to write television, movies and plays for much the same reason that Henry Morgan selected the Spanish Main for his peculiar – and not dissimilar – sphere of operations".
We are a long way from Doris Day, whose sphere of operations did not extend below the equator — barely below the neck, in fact, which is why the title "Pillow Talk" remains her truest legacy.
Managers should be aware, therefore, that individuals may require advice and guidance on regulatory questions if they are contributing to a platform that is outside their usual sphere of operations.
This limited his sphere of operations, and prevented him from obtaining specimens of the best quality.
In 1949 he was tried in Hamburg for war crimes and was convicted on nine of seventeen counts, including the poor treatment of prisoners of war and failing to protect civilian lives in his sphere of operations.
