Providing detailed design specifications to save the engineer time and reduce post-development changes.
Ideally, the Domain Team will recognize the value of user feedback (gathered via thorough research and testing) and accept the design that incorporates that feedback. Ultimately, the project owner is responsible for signing off on the design points. Formally acknowledging their right to do so helps with keeping projects on time, within scope, and on budget. In the Agile process, the project owner must be available to make these types of final decisions on a regular basis.
Get formal approval from the project manager and project owner (note: this approval represents the design of the final product. Any further changes will result in an adjustment to the project's timeline and cost estimates)
Though it's tempting to move along with the development process, it's best to get formal approval of the design by the owner before coding starts. Proper communication will keep frustration levels low and save money. If the team's preference is to implement Agile techniques, then the owner should approve small increments in quick succession.
Send design specifications to the engineers
Once the design has been approved, the UX designer can provide design specifications to the engineers. Knowing the exact color, font, placement, and other specifications will make the engineers' job easier.