Since a framework helps predefine the overall structure and design parameters of an application, more time can be spent constructing the application. Frameworks therefore reduce the overall development time and costs of a project. Frameworks enhance modularity by encapsulating volatile implementation details behind stable interfaces. Framework modularity helps improve software quality by localizing the impact of design and implementation changes. This localization reduces the effort required to understand and maintain existing software.
Frameworks promote component reusability.
The stable interfaces provided by frameworks enhance reusability by defining generic components that can be reapplied to create new applications. Framework reusability leverages the domain knowledge and prior effort of experienced developers in order to avoid re-creating and revalidating common solutions to recurring application requirements and software design challenges. Reuse of framework components can yield substantial improvements in programmer productivity, as well as enhance the quality, performance, reliability and interoperability of software. Frameworks provide a flexible and extensible development platform. A framework enhances extensibility by providing explicit hook methods that allow applications to extend its stable interfaces.