What does software evolution typically involve?

Software evolution typically encompasses the ongoing process of developing and enhancing software systems to meet new requirements and improve functionality. This includes both correcting defects—often referred to as bug fixes—and adding new features to adapt to changing user needs or market demands.

As software is used over time, the original requirements may evolve due to technological advancements, user feedback, or competitive pressures. Thus, the continuous addition of functionalities is crucial in keeping the software relevant and effective. This comprehensive view of software evolution emphasizes not just maintaining the software but actively improving it to enhance user experience and system performance.

Other options focus on narrower aspects of software development. For example, redesigning an entire system can be part of a major overhaul but is not the norm for ongoing evolution. Implementation of security features is only a fraction of what is involved in software evolution, which includes many other needs beyond just security. Lastly, while mobile application development is a specific area of software creation, it does not define the broader concept of software evolution that addresses both maintenance and enhancement across various platforms.