Rapid Prototyping is currently the most popular alternate approach to ADDIE and traditional instructional design. With Rapid Prototyping, the steps are crunched together to reduce the amount of time needed to develop training or a product (Jones & Richey, 2000). The design and development phases are done simultaneously and evaluation is done throughout the process.
What exactly does Rapid Prototyping offer?
Full Text: Instructional Design and Rapid Prototyping: Rising from the Ashes of ADDIE | Social Learning Blog.