Regression testing is a type of testing that is done on an existing system to ensure that the previous functionality still works after a change has been made. Regression testing is a process of retesting or verifying that a software system or application still performs as expected after it has been modified or updated with new features, bug fixes, patches, etc. Regression testing can help to detect any errors or defects that may have been introduced by the change and ensure that no functionality has been broken or degraded.

According to PRINCE2, a project management methodology, the process of initiating a project includes creating the project plan, which is a high-level plan that covers the whole project scope, schedule, budget, quality, and risks. The project plan is based on the project brief, the business case, and the product descriptions. The project plan is used to obtain the authorization from the project board to initiate and execute the project. The project plan is also refined and updated throughout the project life cycle as more information becomes available.
The other processes are not directly involved in creating the project plan. Starting up a project is a pre-project process that ensures the project is viable and worthwhile, and produces the project brief and the initiation stage plan. Managing product delivery is a process that coordinates the delivery of products from the team managers to the project manager, and ensures that the work conforms to the quality criteria and the project plan. Directing a project is a process that enables the project board to oversee and control the project, and make key decisions and approvals. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 5: Project Scope Management1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 5: Project Scope Management2; PRINCE2 Processes - 7 Processes Of PRINCE2 Explained3; Initiating a Project Process - This process is the procedure which defines the product quality, Project Product, project timeline, costs, the commitment of resources, risk analysis, and assembles the Project Initiation Documentation (PID)4

The output of this exercise where the project manager is comparing the cost of the project to the cost savings the project will produce when it is complete will produce the return on investment (ROI). ROI is a financial metric that measures the profitability or efficiency of an investment by comparing its benefits or returns to its costs. ROI can help to evaluate the value or worth of a project and support decision making and prioritization. ROI is calculated by dividing the net benefits (benefits minus costs) by the total costs and multiplying by 100 to get a percentage.

Reviewing the Gantt chart weekly with the team would be the most effective step for the project manager to take to ensure clarity within the team after receiving feedback from the project sponsor that the resources involved in the project are unsure of their daily activities. A Gantt chart is a graphical tool that shows the schedule of a project, including the start and end dates, durations, dependencies, milestones, and progress of each task or activity. Reviewing the Gantt chart weekly with the team can help to clarify their roles and responsibilities, assign tasks and deadlines, track and report their status and performance, identify and resolve any issues or risks, and keep them aligned and engaged with the project goals.VVVVVVVVVVVVVV

Issue log and change log are documents that should be used to record the event where the project team has just experienced an unexpected event and implemented a work-around. An issue log is a document that tracks and records any issues or problems that arise during a project and how they are resolved. An issue log can help to monitor and control the project performance and quality and prevent any negative impacts on the project objectives and deliverables. A change log is a document that tracks and records any changes or modifications that are made to the project scope, schedule, cost, quality, or resources during a project. A change log can help to document the change request, approval, implementation, and impact of each change and ensure traceability and transparency.