A gantt chart is a visual representation of a project timeline that shows the tasks, durations, dependencies, and resources of a project in a horizontal bar chart format. A gantt chart can help a project manager to calculate the progress of the whole project scope by comparing the planned and actual start and finish dates of each task, as well as the percentage of completion and the critical path. A gantt chart is also a useful tool for communicating the project status and performance to the sponsor and other stakeholders. Therefore, the first document that the project manager should update to calculate the progress of the whole project scope is the gantt chart. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 6: Schedule Management1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 6: Schedule Management2; What Is a Gantt Chart? 7 Examples for Project Management3

Work with the project scheduler to update the project timeline. The project manager should work with the project scheduler to update the project timeline after finding an unforeseen dependency on one of the critical project activities that will most likely cause a delay. The project scheduler is a person or a tool that helps plan, schedule, monitor, and control the project activities and resources. The project scheduler can help the project manager to assess the impact of the dependency on the project schedule and identify any possible ways to mitigate or resolve it. The project scheduler can also help to update the project timeline with the revised dates and durations of the project activities and communicate them to the relevant stakeholders.

The project manager can use the burn up chart to analyze the current status of the project based on its scope (value delivered), budget (cost), and schedule (time). A burn up chart is a graphical tool that shows how much work has been completed (burned up) versus how much work remains (scope) over time. It also shows how much budget has been spent (burned up) versus how much budget remains (budget) over time. A burn up chart can help to monitor and control the project progress and performance and identify any variances or deviations from the plan. The chart given shows that both scope and budget lines are above their respective target lines at any given time point. This means that less work has been completed than planned (scope variance) and more money has been spent than planned (budget variance) at any given time point. Therefore, the project is behind schedule and over budget.

The project manager should have a meeting with the project sponsor and main stakeholders first after discovering that some of the legal requirements have not been addressed during the project concept preparation. The project sponsor and main stakeholders are the key decision-makers and influencers of the project. They have the authority and responsibility to approve or reject any changes to the project scope, budget, or schedule. Having a meeting with them can help to communicate the issue, assess the impact, explore alternatives, and seek guidance on how to proceed with the project34

Informal communication is a type of communication that is casual, spontaneous, and unstructured. It does not follow any predefined rules, protocols, or formats. Examples of informal communication include email, phone calls, conversations in the hallway, and impromptu meetings12. The sponsor is using informal communication to communicate with the team, as these methods are convenient, flexible, and personal. However, informal communication may also have some drawbacks, such as lack of documentation, inconsistency, and potential for misunderstanding3. Therefore, the sponsor should also use formal communication when necessary, such as for official reports, contracts, and presentations4.