"your usefulness" is correct and usable in written English.
You can use it when referring to how helpful, valuable, or serviceable something is. For example, "We value your usefulness in helping us reach our goals."
Leaders that will use you for so long as you are perceived as useful as opposed to serve you regardless of your usefulness.
Technology is a wonderful thing if you are putting it to use, less so if it is putting an end to your usefulness.
They just get a note reading "You have outlived your usefulness" and a five minute head-start on the hounds.
But then, in the old days, you tended to be knighted for your usefulness in the committee room rather than at the crease.
It's not relegation to history's scrapheap, rather it's the ultimate vindication of your usefulness – being turned into a utility, as vital and invisible and boring as the forces that lurk behind our water-faucets and light switches.
8 Your job The moment it looks as if staying in your job is an impediment to your long-term objectives of becoming leader of the Conservative party, make it clear to David Cameron that you've never been very interested in education and you have outlived your usefulness.
We welcome your feedback on its usefulness for your research.
And how can your app extend the usefulness of your product and increase its value and relevance?
In particular, you should not dwell on your career interests and the usefulness of your Program II to your plans for the future.
Independent developers can help build bridges between your project and other popular technologies, increasing your project's usefulness and garnering exposure with other communities.
If you have any questions, talk with your doctor about their usefulness and relevancy in your case.
