To manage business concerns and expectations effectively, the project manager should ensure that there is a clear release plan and roadmap for the project. This approach helps in setting realistic expectations by providing a visual representation of the project's trajectory, including key milestones, deliverables, and timelines. It also facilitates better communication with stakeholders by giving them a clear understanding of what the project aims to achieve and when. This proactive measure can help in aligning stakeholder expectations with the project's goals and capabilities, thereby mitigating concerns about whether the project will meet expectations45.
References:
PMBOK Guide - Seventh Edition, particularly sections related to stakeholder engagement and project communication management1.
Project Management Institute's resources on developing a project roadmap and managing stakeholder expectations23.
Professional in Business Analysis (PMI-PBA) resources on stakeholder engagement and expectation management678910.

According to the PMBOK Guide, one of the tools and techniques for planning project resources is responsibility assignment matrix (RAM). RAM is a grid that shows the project resources assigned to each work package. It helps to clarify the roles and responsibilities of each team member and ensure that all the work is accounted for. A common type of RAM is the RACI chart, which stands for responsible, accountable, consult, and inform. A RACI chart indicates the level of involvement and authority of each team member for each project activity. Asking the functional manager to create a specific RACI chart for the team member who is unclear about their role and responsibilities is an example of applying this technique to address the situation and improve the team member's understanding and performance. Developing a work plan, advising to review the resource management plan, or telling to review the project charter are not the best options, as they may not provide enough detail or clarity for the team member, or may be redundant or irrelevant. References: PMBOK Guide, 6th edition, page 314.

The project manager realizes that the project performance will be measured based on budget deviation and revenue, but without consideration for the overall project schedule. This could lead to a situation where the project is successful in terms of budget and revenue, but fails in terms of schedule. Therefore, the project manager should review the schedule baseline and consider adopting a schedule performance indicator. This will ensure that the project schedule is also taken into account when measuring project performance. References: PMBOK Guide, 6th Edition, Section 6.6.1.1, "Schedule Baseline" and Section
7.4.2.1, "Cost Performance Baseline"

The project manager should analyze the reason for the gap in understanding with both sides and negotiate a solution, as this is a strategy for managing stakeholder dissatisfaction in agile projects. According to the Agile Alliance, one of the principles of agile software development is to satisfy the customer through early and continuous delivery of valuable software. However, sometimes the customer or stakeholder may not be satisfied with the product, even if it meets the acceptance criteria and is approved by them. This may happen due to various reasons, such as unclear or changing requirements, miscommunication, unrealistic expectations, or lack of feedback. The project manager should identify the root cause of the dissatisfaction and try to resolve it through dialogue and collaboration. The project manager should also use agile techniques, such as backlog refinement, user stories, sprint reviews, and retrospectives, to ensure that the product delivers value to the stakeholder and aligns with their vision and goals1.
The other options, asking the project team to perform the modifications, asking the stakeholder to submit a change request, or explaining to the stakeholder that the project can be closed, are not the best ways to manage stakeholder dissatisfaction in agile projects. Asking the project team to perform the modifications may not address the underlying issue of the dissatisfaction and may also introduce new risks or defects to the product. Asking the stakeholder to submit a change request may not be feasible or appropriate in an agile environment, where changes are expected and welcomed, as long as they add value to the product and do not compromise the quality or scope2. Explaining to the stakeholder that the project can be closed may not satisfy the stakeholder or improve the relationship, as it may imply that the project manager is not willing to listen to their feedback or concerns.
3 A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Sixth Edition, Chapter
13 2 Agile Practice Guide, Chapter 2 1 Effective Ways for Stakeholder Management in Agile - Premier Agile 4 How to Explain Agile to Your Stakeholders | Agile Alliance

According to the Project Management Body of Knowledge (PMBOK) Guide, when a stakeholder requests a change, especially when the project is nearing completion, the project manager should first raise a change request to the Change Control Board (CCB). The CCB is responsible for reviewing and approving or rejecting change requests. Informing the project sponsor about the change is also important as they need to be aware of potential impacts on the project's objectives and deliverables. This process ensures that changes are managed in a controlled manner, minimizing the risk of scope creep and maintaining the integrity of the project management plan. References: Project Management Professional (PMP) Reference Materials, PMBOK Guide, Chapter 4: Integration Management.