Mapping from parameters (i.e. a parameterization or parameter configuration) to parameter values. An arm provides the configuration to be tested in an Ax trial. Also known as "treatment group" or "parameterization", the name 'arm' comes from the Multi-Armed Bandit optimization problem, in which a player facing a row of “one-armed bandit” slot machines has to choose which machines to play when and in what order.
Relative outcome constraint
Continuous, discrete or mixed design space that defines the set of parameters to be tuned in the optimization, and optionally parameter constraints on these parameters. The parameters of the arms to be evaluated in the optimization are drawn from a search space.
Subclass of experiment that assumes synchronous evaluation (uses an evaluation function to get data for trials right after they are suggested). Abstracts away certain details, and allows for faster instantiation.