According to the PMI Guide to Business Analysis, change control systems are tools that help to manage changes to requirements or other project deliverables throughout the project life cycle. Change control systems include provisions to implement changes without formal review in the event of an emergency, such as when there is an urgent need to fix a critical defect or issue that affects the project scope, schedule, cost, quality, or risk. However, when this provision is utilized, changes must still be documented and captured in order to maintain traceability and accountability of the changes, and to communicate them to all relevant stakeholders. Documenting and capturing changes also helps to avoid any confusion or inconsistency in the requirements or other project deliverables, and to evaluate their impact and outcome. The risk associated with the change is still evaluated before implementing it, even in an emergency situation. A change control board should already be established as part of the change control system. Changes may still require further managerial involvement after they are implemented in order to monitor and control their effects. References:
PMI Guide to Business Analysis, page 288-289.

Plurality is the decision role that was used by the project team to decide which requirements will be included in the next release. Plurality means that the option with the most votes is selected, even if it does not have a majority (more than 50%) of the votes. Plurality is a decision role that can be used when there are more than two options and a quick decision is needed. References: PMI Guide to Business Analysis, Chapter 4, Section
4.3.2.4; PMI Professional in Business Analysis (PMI-PBA)Examination Content Outline, Domain II:
Planning, Task 3.

Interviewing stakeholders to clearly define the problem is the most important action to contribute to the success of the initial stage of the project. Interviewing is an elicitation technique that involves asking questions to stakeholders to gather information about their needs, expectations, issues, and goals. Defining the problem clearly helps to establish the business need, the project scope, and the solution approach. References:
PMI Guide to Business Analysis, Chapter 6, Section 6.3.2.5; PMI Professional in Business Analysis (PMI- PBA) Examination Content Outline, Domain I: Needs Assessment, Task 2.

Business use cases are the documents that the business analyst should pay the most attention to ensure the project succeeds this time. Business use cases are documents that describe the interactions between the users and the system, and the value or benefit that the users obtain from the system. Business use cases can help the business analyst and the project team to understand the business needs, goals, and expectations of the stakeholders, and to define the scope, functionality, and behavior of the system. Business use cases can also help to verify and validate that the system meets the requirements and delivers the desired outcomes.
References: PMI Professional in Business Analysis (PMI-PBA)Examination Content Outline1, page 18; Business Analysis for Practitioners: A Practice Guide2, page 93.

Asking stakeholders to vote on the requirements is a technique that the business analyst can employ to rectify the issue of not having enough resources to deliver all the requirements. Voting is a method of prioritizing requirements by asking stakeholders to rank or rate them according to their importance, urgency, value, or risk. Voting can help to identify the most critical or essential requirements that should be delivered first or within the available resources. Voting can also help to resolve conflicts or disagreements among stakeholders and reach a consensus on the priority of the requirements. Holding a brainstorming workshop to build the rationale for the requirements is not an effective technique to rectify the issue, as it does not address the resource constraint or the priority of the requirements. Brainstorming is a method of generating ideas or solutions by encouraging free and creative thinking from participants. Brainstorming can help to elicit or analyze requirements, but not prioritize them. Performing traceability to find out where the requirements originated is not a useful technique to rectify the issue, as it does not indicate the importance or value of the requirements. Traceability is a process of tracking the relationship between requirements and other project artifacts, such as design, test cases, or deliverables. Traceability can help to ensure completeness, consistency, and quality of the requirements, but not prioritize them. Surveying stakeholders on their likes and dislikes about the requirements is not a viable technique to rectify the issue, as it does not provide a clear or objective way of prioritizing the requirements. Surveying is a method of collecting feedback from stakeholders by asking them questions about their satisfaction, preferences, expectations, needs, problems, or suggestions. Surveying can help to validate or evaluate the requirements, but not prioritize them. References:
PMI Professional in Business Analysis (PMI-PBA)Examination Content Outline1, page 15; Business Analysis for Practitioners: A Practice Guide2, page 95.