Able to be controlled; subject to regulation or command.
For instance, such nonweather factors as insects, disease, errors of management, accidents, and other factors may not be considered controllable […]1961, American Farm Economic Association, Journal of Farm Economics:
A spring-loaded reducing valve, controllable from the cab, admitted h.p. steam to both h.p. and l.p. cylinders whenever necessary, as, for example, on starting; [...].1961 Novermber, Voyageur, “The last of the Midland compounds”, in Trains Illustrated, page 675:
The widest variety of marketing research studies focus on the influences of controllables—products, distribution, promotion, and price.1976, Edward W. Cundiff, Richard Ralph Still, Norman A. P. Govoni, Fundamentals of Modern Marketing, page 131: