Rails supports rapid application development (RAD) in the following ways:
The framework is aligned with the convention over configuration paradigm, that allows developers to focus on the unique aspects of their application, rather than spending time on low-level details.
Ruby developers can quickly generate basic application components, such as controllers, models, and views thanks to the scaffolding feature.
Ruby’s built-in support for many popular database systems (MySQL, PostgreSQL, SQLite and others) allows to integrate database functionalities without having to write complex SQL queries or manage database connections manually.
The framework’s built-in testing feature allows developers to catch bugs and issues early in the development process.
The modular architecture of RoR allows for easy addition or removal of any functionalities, allowing for quick changes with minimal disruptions.