To implement the new Must Have requirement for financial transaction functionality on the coffee shop insurance product website, the Technical Coordinator should focus on actions that align with their role in overseeing the technical aspects of the project. The following actions are most appropriate for the Technical Coordinator:

Selected Actions for the Technical Coordinator:

A. Ensure that the latest version of the website design in the Solution Architecture Definition is provided to all members of the Solution Development Team.

E. Check for any documented standards which need to be applied to the development of online financial transaction functionality.

A. It's crucial for the Technical Coordinator to ensure that the Solution Development Team has access to the most current website design specifications, especially when new functionalities are being added. This ensures consistency and alignment with the overall solution architecture, facilitating effective and efficient development.

E. The Technical Coordinator is responsible for ensuring that all technical aspects of the project adhere to relevant standards, including those related to online financial transactions. This involves identifying, understanding, and applying any necessary regulatory, security, and technical standards to the development process, ensuring compliance and functionality.

Why Other Actions Are Less Suitable:

B. Assessing the impact on the original Business Case is typically the responsibility of the Business Sponsor or Project Manager, as it involves financial and strategic considerations beyond the Technical Coordinator's primary focus.

C. Adding tasks to the Timebox Plan is generally a responsibility shared between the Project Manager and the Solution Development Team, with the Technical Coordinator providing input on technical feasibility and requirements.

D. Consolidating and circulating an agenda for the workshop is an important logistical task but may not directly fall under the Technical Coordinator's responsibilities. This task is often handled by the Project Manager or a designated administrative role.