What enhances the likelihood of delivering requested functionality on time?

The correct choice relates to the importance of regularly reviewing the requirements and adjusting priorities in a project. This practice enhances the likelihood of delivering requested functionality on time because it ensures that the team is aligned with the most current project needs and stakeholder expectations.

By continuously reviewing requirements, the team can identify which features are most critical and should be prioritized for development. This approach allows for flexibility in responding to changes in business needs or user feedback, which is often necessary in dynamic project environments. It also helps to manage the scope of the project effectively, avoiding last-minute changes that could lead to delays.

This practice contrasts with other options that, while they may contribute positively to project management, do not directly address the fundamental issue of aligning work with current priorities. For instance, improving communication with the development team can foster better collaboration and understanding, but without proper prioritization of requirements, it may not necessarily lead to on-time delivery. Updating the project schedule with precise deadlines is important for tracking progress but doesn't inherently account for changes in project scope or priorities. Similarly, having a dedicated testing team can enhance quality assurance processes, but it doesn’t specifically ensure timely delivery unless it is coupled with appropriate prioritization and requirement management.