Explanation
Engaging all stakeholders early in the requirements gathering phase is a good practice to ensure stakeholder satisfaction with the enhancement. By involving the stakeholders in the elicitation process, the business analyst can understand their needs, expectations, preferences, and constraints. By defining the acceptance criteria with the stakeholders, the business analyst can establish a clear and measurable definition of what constitutes a successful solution. Engaging all stakeholders early can also help to build trust, collaboration, and buy-in for the change. Requesting that the project manager identify all affected project stakeholders is not sufficient to ensure stakeholder satisfaction, as it does not involve direct communication with the stakeholders.
Providing all signed-off project documentation to the stakeholders for information purposes only is not effective, as it does not allow for feedback or validation from the stakeholders. Soliciting feedback and adding requirements to the project backlog is not advisable, as it can lead to scope creep, rework, and delays. References: PMI Professional in Business Analysis (PMI-PBA)
Examination Content Outline1, page
11; Business Analysis for Practitioners: A Practice Guide2, page 66.

Explanation/Reference: https://www.lucidchart.com/blog/as-is-process-analysis

Explanation
The requirements sign-off is a process that involves obtaining the formal approval and acceptance of the requirements from the customer and other stakeholders. The requirements sign-off confirms that the requirements are clear, complete, correct, and consistent, and that they meet the customer's needs and expectations. The requirements sign-off also establishes a baseline for the development and testing of the solution, and serves as a reference point for managing changes and resolving issues. The business analyst should first facilitate the requirements sign-off with the customer before the developers start development, to ensure that the requirements are agreed upon and validated by all parties, and to avoid rework, delays, and conflicts later in the project. References: PMI Professional in Business Analysis (PMI-PBA)
Examination
Content Outline1, page 18; Business Analysis for Practitioners: A Practice Guide2, page 92.

Explanation
Interface analysis is a technique to describe how different components or systems interact with each other and exchange information. Interface analysis can help to identify the inputs, outputs, and dependencies of each system, and to ensure that they are compatible and consistent with each other. Interface analysis can also help to detect potential integration issues, gaps, and conflicts among the systems. An organization that is in the process of replacing its current system should conduct interface analysis to facilitate a successful migration, as it would help to ensure that all current connections to other systems remain functional after the upgrade. The other options are not correct. Document analysis is a technique to review existing documents or records to elicit information or requirements. User interface analysis is a technique to design and evaluate how users interact with a system or product. Systems analysis is a technique to understand and model the structure, behavior, and functions of a system or process.

Explanation
According to the PMI Professional in Business Analysis objectives and content, an impact analysis is a technique that is used to assess the effects and implications of a change request on the requirements, scope, schedule, cost, quality, and other aspects of a project or product. An impact analysis can help to determine the feasibility, desirability, and priority of the change request, as well as to identify the risks, issues, and dependencies associated with the change. An impact analysis can also help to communicate the impact of the change to the stakeholders, and to support the decision-making process for approving or rejecting the change request. References:
PMI Professional in Business Analysis objectives and content: PMI-PBA Certification PMI Professional in Business Analysis reference list: PBA Reference List PMI Professional in Business Analysis study guide: Study.com