According to the PMBOK Guide, one of the key roles of the project manager in an agile environment is to facilitate collaboration among stakeholders and the team. This helps to manage conflicts, clarify requirements, and align expectations. The project manager should also promote the agile values and principles, such as customer satisfaction, responding to change, and delivering value incrementally. By doing so, the project manager can help move the project forward and ensure the delivery of a high-quality product that meets the customer's needs. (PMBOK Guide, 6th edition, pp. 53-54) References:
* PMBOK Guide, 6th edition, Chapter 3: The Role of the Project Manager, Section 3.3: The Project Manager's Sphere of Influence, pp. 53-54
* Agile Practice Guide, Chapter 2: An Introduction to Agile, Section 2.2: Agile Manifesto Values and Principles, pp. 10-13

Analogous estimating: Analogous estimating is also called top-down estimating and uses the actual cost of a previous, similar project as the basis for estimating the cost of the current project.