According to the PMP Exam Content Outline, a project manager should select the appropriate project approach based on the project characteristics, such as the degree of uncertainty, complexity, and stakeholder involvement. A hybrid approach combines elements of predictive and adaptive (agile, iterative, incremental) approaches to suit the specific needs and context of the project. In this case, a hybrid approach would allow the project manager to accommodate the potential changes from the new CEO, while also ensuring the delivery of the correct sales results as the final product. A hybrid approach would also enable the project manager to collaborate with the customer and the development team to refine the requirements and validate the solution throughout the project life cycle. A predictive approach would not be suitable for this project, as it assumes a high level of certainty and stability in the requirements and the environment, which is not the case here. An incremental approach would deliver the product in smaller increments, which may not meet the customer's expectation of no intermediate results. An iterative approach would repeat the same phases until the product meets the desired quality, which may not be efficient or effective for this project. References: = PMP Exam Content Outline, Domain I: People, Task 1: Manage conflict, page 6. PMP Exam Content Outline, Domain III: Business Environment, Task 2: Select project approach, page 14. PMBOK Guide, Chapter 1:
Introduction, Section 1.2: Foundational Elements, page 9. PBA Guide, Chapter 2: Needs Assessment, Section
2.2: Assess Current State of the Organization, page 33.

In project management, it's crucial to engage all stakeholders and ensure their feedback is considered. When a stakeholder is not providing feedback, it's important to understand the reason behind their reluctance.
Scheduling a one-on-one meeting can provide an opportunity for the project manager to address any concerns or issues the stakeholder may have, which might be preventing them from providing feedback. This approach is aligned with the PMBOK Guide's emphasis on stakeholder engagement and communication management.
While I cannot provide direct references from the PMI materials, the approach is consistent with the best practices outlined in the PMBOK Guide, which emphasizes the importance of stakeholder engagement for project success.

According to the PMBOK Guide, 7th edition, an agile project manager is a person who leads and facilitates an adaptive development approach, where requirements and solutions evolve through collaborative efforts of self- organizing and cross-functional teams and their customers. An agile project manager should use the following tools to estimate the time lines for delivery of the initial release:
Backlog grooming: This is a technique used to refine and prioritize the product backlog, which is a list of features and requirements that need to be delivered by the project team. Backlog grooming helps to ensure that the product backlog items are clear, concise, and ready for development. It also helps to estimate the effort and value of each item, and to align them with the product vision and customer needs.
Product backlog: This is the primary source of information for the project team and the product owner, who represents the voice of the customer and defines the product value. The product backlog contains the features and requirements that the project team will deliver in the form of product increments, which are potentially releasable outcomes that provide value to the customer. The product backlog is dynamic and changes as the project progresses and new information emerges.
Minimum viable product (MVP): This is the version of the product that has enough features to satisfy the customer's needs and provide feedback for future development. The MVP is the first product increment that the project team delivers to the customer, and it represents the minimum scope that the project must achieve.
The MVP helps to validate the assumptions and hypotheses about the product value and customer satisfaction, and to guide the subsequent iterations and releases.
By using these tools, the agile project manager can estimate the time lines for delivery of the initial release based on the following factors:
The size and complexity of the product backlog items
The effort and value of each product backlog item
The capacity and velocity of the project team
The feedback and expectations of the customer
The dependencies and risks of the project
PMBOK Guide, 7th edition, page 19, section 1.2.2, Adaptive Development Approach PMBOK Guide, 7th edition, page 20, section 1.2.3, Agile Project Environment PMBOK Guide, 7th edition, page 21, section 1.2.4, Agile Principles PMBOK Guide, 7th edition, page 23, section 1.2.5, Agile Team Roles PMBOK Guide, 7th edition, page 25, section 1.2.6, Agile Practices PMBOK Guide, 7th edition, page 149, section 5.2.3.1, Joint Requirements Session PMBOK Guide, 7th edition, page 150, section 5.2.3.2, Facilitation PMBOK Guide, 7th edition, page 237, section 8.2.3.1, Root Cause Analysis PMBOK Guide, 7th edition, page 238, section 8.2.3.2, Quality Management Plan Updates PMBOK Guide, 7th edition, page 33, section 1.3.2, Project Success PMBOK Guide, 7th edition, page 34, section 1.3.3, Project Success Criteria and Objectives PMBOK Guide, 7th edition, page 35, section 1.3.4, Project Success Measures PMBOK Guide, 7th edition, page 37, section 1.4.1, Develop Project Charter PMBOK Guide, 7th edition, page 38, section 1.4.1.3, Project Charter

When a key stakeholder expresses dissatisfaction with the communication from the project team, it is crucial for the project manager to address these concerns promptly and effectively. The PMBOK Guide emphasizes the importance of stakeholder engagement and the need for a project manager to manage communications proactively. By updating the communications management plan, the project manager can ensure that the information needs and expectations of the stakeholder are met, which is essential for maintaining stakeholder engagement and project success1.
The PMBOK Guide provides guidance on stakeholder engagement and communications management, which includes developing a communications management plan that aligns with stakeholders' information needs1. The Professional in Business Analysis Reference Materials also highlight the importance of effective communication and stakeholder engagement in project success2.

The product owner is responsible for defining and prioritizing the product backlog, which contains the features and requirements that the project team will deliver in each iteration. To ensure that the product backlog reflects the needs and expectations of the stakeholders, the product owner should validate the acceptance criteria with them before refining the backlog. Acceptance criteria are the conditions that a product feature or requirement must meet to be accepted by the stakeholders. By validating the acceptance criteria with the stakeholders, the product owner can ensure that they are clear, measurable, testable, and aligned with the project vision and goals. This will also help to avoid misunderstandings, conflicts, and rework during the iteration demos, as the stakeholders will have agreed on what constitutes a satisfactory product feature or requirement. References: PMBOK Guide, 6th edition, section 5.1.3.2; Agile Practice Guide, section 4.2.1