A business analyst has been assigned to a project to implement a new phone system for a customer call center. The business analyst will need to create a business case.
Which of the following components will the business analyst use as input to the business case?

A new project's goal is to replace an existing system. What is an input into solution evaluation and decision making in this context?

A business analyst needs to estimate the effort associated with project requirements. However, the lack of detail is concerning. What technique could the business analyst use to help alleviate this concern?

Through user acceptance testing, a software flaw was identified. What should the business analyst do next as part of the root cause analysis in order to analyze and resolve the discrepancy?

A company is working on the next big release of their best-selling product. The requirements will be validated through in-person validation sessions. What would be the most viable technique to use in this scenario?