Which term describes an iterative design approach that builds a model of a system to ensure it meets user and business requirements?

RAD is a software development methodology emphasizing quick development and iteration of prototypes, but it does not specifically focus on building a model to validate user and business requirements in the same detailed manner as discovery prototyping does. While RAD involves user feedback, its primary goal is to accelerate the delivery of functional software, rather than iteratively refining a model based on user interactions.

JAD is a collaborative approach that involves stakeholders and developers working together to gather requirements and design systems. However, it does not inherently focus on the iterative modeling aspect characteristic of discovery prototyping. JAD sessions aim to define requirements through discussions rather than through the iterative process of creating and refining prototypes for feedback.

Loose coupling refers to a design principle where components of a system are minimally dependent on one another. While it is an important concept in system architecture, it does not describe an iterative design approach or the process of building models to ensure alignment with user and business requirements. Loose coupling is more about the relationships between system components than about user engagement in design.