In the context of a project transition, especially one that involves a significant shift in business focus, effective communication is crucial. A communications management plan ensures that all stakeholders are informed about the project's progress, changes, and challenges. It helps to align the stakeholders, manage their expectations, and address their concerns, which is particularly important when there is disagreement about the need for transformation. The plan should include the types of information to be communicated, the methods of communication, the frequency of communication, and the parties responsible for the communication. References: Project Transition Planning: Process, Checklist, Tools - KnowledgeHut, What Is a Project Transition Checklist? (With Example) - Indeed

According to the PMBOK Guide, when using an agile approach, the project manager needs to deliver value early and often by creating and testing increments of the product, service, or result that are potentially releasable1. A minimum viable product (MVP) is a version of the product that has enough features to satisfy the initial needs of the customers and stakeholders, and to provide feedback for future development2. By developing an MVP for assessment from a select customer group, the project manager can address the issue of the product owner's uncertainty about the business value of each feature, as well as validate the product vision, test the assumptions, and reduce the risks2. The other options are not appropriate, as they do not reflect the agile mindset and principles. Assessing the product roadmap, commissioning a business analyst, or completing a WBS are all possible actions that could be taken in a predictive or waterfall approach, where the product features are defined and fixed upfront. However, in an agile approach, the product features are emergent and adaptive, and the project manager should collaborate with the customer and the team to deliver the best possible product3. References:
* 1: PMBOK Guide, 6th edition, page 18
* 2: PMBOK Guide, 6th edition, page 158
* 3: PMBOK Guide, 6th edition, page 156

A stakeholder engagement plan (SEP) documents how involved and influential your project stakeholders are. It also outlines your stakeholder communication plan, including when you'll reach out to each stakeholder, what platform you'll use, and how much information you'll deliver1. The project manager should assess the information requirements of the community to ensure effective communication and engagement.
This involves understanding what information the community needs, how they prefer to receive it, and how often they need updates. This approach helps to build trust, manage expectations, and foster a positive relationship with the community, which can contribute to the success of the project1. References: Asana Resources | Project management | 5 steps to creating a stakeholder engagement plan

The lessons learned database is a valuable resource for reviewing past projects, which can provide insights into the performance and reliability of potential vendors. It contains historical information that can help in making informed decisions about vendor selection by analyzing previous experiences, challenges, and successes related to similar procurements1234.
References:
PMBOK Guide - Seventh Edition5
The PMI Guide to Business Analysis6
Business Analysis for Practitioners: A Practice Guide7

In Agile project management, when a team member is struggling with an impediment that is hindering the team's progress, the project leader should identify the impediment and associated risks at the daily standup12. The daily standup, also known as the daily scrum, is a short meeting where the team discusses progress and identifies obstacles2. By bringing up the impediment and its associated risks during this meeting, the project leader ensures that the entire team is aware of the issue and can work together to find a solution12. This approach aligns with the Agile principle of self-organization, where individuals on the team take on key responsibilities2. References:
* Who Is An Agile Team Leader And What They Do?1
* Agile Team Roles and Responsibilities: A Brief Guide2
* Leadership in agile projects - what makes for success?3