What technique is commonly used in Rapid Application Development?

Joint Application Development (JAD) is the correct technique commonly used in Rapid Application Development (RAD). RAD emphasizes user involvement and rapid iterations in the development process, aiming to accelerate the delivery of software. JAD specifically facilitates this by bringing together stakeholders, including users, developers, and subject matter experts, in structured workshops to collaboratively define requirements and create solutions. This approach helps to gather insights quickly from users, leading to a better understanding of needs and faster adjustments, ultimately enhancing the iterative development cycle that RAD promotes.

The other techniques mentioned do not align as closely with the core principles of RAD. While iterative development is part of the RAD approach, it is the collaboration and structured outcome focus of JAD that makes it particularly integral within this context. Waterfall development is a traditional, sequential approach that does not allow for the same level of flexibility and user input as RAD. Code reviews, while beneficial for quality assurance in software development, do not specifically address the collaborative and rapid nature of RAD projects.