The RAD model in software engineering involves five general steps. The nature of rapid application development makes it suited for larger projects and ones that require more attention to detail. The main principles of RAD methodology include
1. Sketch out project requirements
The client or stakeholders hold a discussion with the developers to map out the project requirements. It is a collaborative effort that requires feedback from the clients as well as the developers taking on the project. Project requirements such as the idea for the MVP (Minimum Viable Product), the estimated time, deadlines, and project requirements on a stage-by-stage basis are decided.
However, the project requirements are flexible and are not rigid as in a waterfall model. A rough draft of the idea can be approved by the management, prior to moving on to the next step in the RAD model phases.
2. Draft prototype
The prototype or the minimum viable product (MVP) is created at this stage, in Rapid app development. Designers and developers work together to decide on a rough blueprint that is modified throughout the software development process. Clients' feedback is taken note of and implemented while working on the minimum viable product.
3. Implement user feedback
This is the step where rough blueprints or drafts are converted into working models. Clients may discover that in some cases, the prototypes may not work, or suggest changes. Any desired changes by the clients lead to the developers going back to step 2 in the RAD model phases. This helps implement changes and then shift to the next step.
Since the developers can address most user feedback and issues in the draft prototype stage, the working model is delivered faster. Only when feedback is strictly positive, the developers move on to the next phase.
4. Finalize the product
Finalizing the product is the last stage where developers ensure that all the necessary feedback is implemented. In this phase, the product is moved to a live environment where testing occurs to identify any product bugs present.
At this phase, the post-deployment maintenance and performance is assessed by the developers prior to handing the application over to the client. This ensures that there are no immediate security issues, bugs to deal with, or any documentation left incomplete. This leads to an all-around inspection of the final product prior to usage by the client.