A business analyst has been assigned to a project to implement a new phone system...

 The business analyst will need to use the product scope as an input to the business case. The product scope is the description of the features, functions, and characteristics of the product, service, or result that the project will deliver. The product scope helps to define the business problem or opportunity, the desired outcomes, and the benefits of the solution. The product scope also helps to identify the assumptions, constraints, risks, and dependencies that may affect the project feasibility and viability. References: PMI Professional in Business Analysis (PMI-PBA)® Examination Content Outline1, page 9; Business Analysis for Practitioners: A Practice Guide2, page 36.