trialling
verb
Definitions
To carry out a series of tests on (a new product, procedure etc.) before marketing or implementing it.
Example: The warning system was extensively trialed before being fitted to all our vehicles.
To try out (a new player) in a sports team.
Example: The team trialled a new young goalkeeper in Saturday's match, with mixed results.
noun
Definitions
The process of running a trial; an experiment or pilot.
The running of trial races, especially for horses or greyhounds.