Who developed JAD and in what decade?

The correct answer highlights that James Martin developed Joint Application Development (JAD) in the 1980s. JAD is a methodology used in the systems development process that focuses on bringing together various stakeholders, including users and IT professionals, to collaboratively discuss and refine system requirements and designs. The approach emphasizes communication and shared understanding among all parties, leading to better outcomes in system development efforts.

The mention of Dan Gielan and the 1970s or 1960s is not accurate because JAD did not formally originate until the work done by James Martin in the 1980s. His contributions significantly shaped contemporary practices in system development and user involvement, which enhances the quality and effectiveness of software projects. Understanding this context helps reinforce the significance of James Martin's work and the importance of collaborative methodologies in information system development.