What term describes the capability of the software product to be tested after modifications?

The term that describes the capability of the software product to be tested after modifications is testability. Testability refers specifically to the ease with which a software product can be verified and validated after changes have been made. A product that is highly testable allows for efficient and effective testing processes, ensuring that any modifications do not introduce new defects or compromise existing functionality.

Testability encompasses various aspects, such as how easily test cases can be created, the presence of sufficient documentation, and whether the software is designed in such a way that its components can be tested individually. A focus on enhancing testability during the development process can lead to a more robust and resilient software product, reducing the time and resources needed for regression testing after modifications.

In contrast, usability pertains to how easy and satisfying the software is for users to operate, understandability relates to how comprehensible the software's functionality and design are for stakeholders, and traceability describes the ability to link different requirements, design elements, and test cases throughout the development lifecycle. While these concepts are important in software development, they do not specifically address the ability to facilitate testing after modifications.