Which stage focuses on ensuring that the new system meets all expectations?

The evaluation stage is critical because it assesses whether the new system fulfills the requirements and expectations set during the initial phases of the project. This stage involves a systematic review of the system's performance against the criteria established at the outset. It examines if the system meets the users’ needs, functions as intended, and adheres to any regulatory or quality standards that may have been defined.

During evaluation, various techniques such as user feedback, performance metrics, and comparison with the requirements are utilized to ascertain the effectiveness of the system. This feedback is crucial as it can lead to further enhancements or modifications, ensuring that the final product aligns with the original goals.

The other stages, such as testing, focus on identifying bugs or flaws in the system before it goes live, implementation involves putting the system into practical use, and documentation is concerned with creating guides and records for users and maintainers of the system. While these stages are important, they do not specifically center on the assessment of whether the system meets expectations in the same comprehensive manner that the evaluation stage does.