During the initial phase of a project, which technique could assist in identifying and categorizing the stakeholders?

Once the requirements are compared to internal and external quality standards, what should the business analyst do next?

The business analyst is in the process of implementing a solution for a customer. The team is having difficulty confirming if certain requirements have been met.
What could have caused this issue?

Inthe middle of a project, a new requirement was added to the scope. The business analyst must determine if any impacts, dependencies, or risks are associated with the addition to the scope.
What task should the business analyst perform in order to identify these impacts?

A business analyst is working on a project to implement a new call management system for a help desk. They expected the average time interval to answer a call to decrease over time, but the interval has increased instead.
Which technique should the business analyst use to investigate the problem?