Decision-making models that employ a simple, graphical structure to categorize objects or make decisions by asking a series of yes/no questions sequentially, designed to be both fast in execution and frugal in the use of information.
A fast-and-frugal tree might be used to classify images as either animals or plants based on a series of yes/no questions such as ‘Does the image have four legs?’, ‘Does the image have leaves?’, etc.