Six months into development, the core team assigned to implement a new internal piece of software must convene to discuss a new requirement with the stake holders. A stakeholder identified a missing…

The system integration phase occurs much later in the SDLC, involving the combination and testing of different software modules, which is distinct from the initial evaluation of a new requirement.

The system analysis phase of the SSDLC is where new requirements are gathered, their feasibility is assessed, and potential security implications and vulnerabilities are analyzed to ensure secure design and implementation moving forward. This directly matches the team's task of validating a new requirement's feasibility and ensuring it introduces no new vulnerabilities.

The system design phase focuses on creating detailed architectural and technical plans for *how* the software will be built, which typically follows the analysis and validation of requirements.

The system development phase involves the actual coding and building of the software, which happens after requirements have been analyzed and a design has been established.