Ais defined as a suspension system that allows a worker to descend in a controlled manner and, as needed, to stop at any point to perform work.

The answer to this question would be: Rope Descent System (RDS)

Rope descent system is a suspension system used by worker to descending. It was used in a job that needed to be done in high altitude like cleaning the windows. The rope descent system might have an anchorage, carabiner shackle, a support rope, a descending device, and a chair.