A ticketing system is a tool that allows the project manager to assign, track, and manage tasks for the testing phase. A ticketing system can help the resources to remain at their desks and only react when needed, because they can receive notifications, updates, and feedback on their tickets through email or other channels. A ticketing system can also help the project manager to monitor the progress, quality, and issues of the testing phase, and to generate reports and metrics. A ticketing system is different from a videoconference, which is a tool that allows the project team to communicate and collaborate in real time through audio and video. A videoconference is not suitable for allowing the resources to remain at their desks and only react when needed, because it requires their active participation and attention. A ticketing system is also different from a simple messaging system, which is a tool that allows the project team to exchange text messages and files. A simple messaging system is not effective for assigning, tracking, and managing tasks for the testing phase, because it lacks the features and functions of a ticketing system, such as prioritization, categorization, status, and history. A ticketing system is also different from a corporate social media, which is a tool that allows the project team to share information and ideas through online platforms. A corporate social media is not appropriate for allowing the resources to remain at their desks and only react when needed, because it may not be secure, reliable, or professional for the testing phase. References = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 10: Project Execution1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 10: Project Execution2; The 15 best collaboration tools for productive teams3

A dashboard is a tool that the project manager will most likely use to update the project sponsor and senior stakeholders about the progress of a project. A dashboard is a graphical tool that displays key performance indicators (KPIs), metrics, and data related to a project using charts, graphs, tables, or other visual elements.
A dashboard can help to provide a quick and easy overview of the project status and performance and highlight any issues or risks that need attention.

Explanation
A task board is a visual tool that displays team progress for stand-up meetings. A task board usually consists of columns that represent different stages or statuses of tasks, such as to do, in progress, done, or blocked.
Each task is represented by a card or sticky note that can be moved across the columns as the task progresses.
A task board can help to facilitate communication, collaboration, and transparency among team members and stakeholders. It can also help to track and manage work flow, prioritize tasks, identify bottlenecks, and resolve issues3

Time zones are the most important factor to consider when setting up a troubleshooting session for team members who are located in different regions of the world. The project manager should ensure that the session is scheduled at a convenient and reasonable time for all participants, and avoid scheduling conflicts or communication delays. Time zones can also affect the availability and responsiveness of stakeholders, vendors, and customers1.