You are preparing a business case for your organization to determine the justification of the costs of the solution in relation to benefits the solutions will bring the organization. You need four inp

A feasibility study is typically conducted as a result of or alongside the business case process to evaluate whether a proposed solution is viable - it is not an input required before writing the business case. The business case draws on inputs such as the business need, stakeholder concerns, and assumptions and constraints to justify the investment.

Stakeholder concerns are a valid input to the business case because they identify risks, benefits, and organizational impacts that must be addressed in the justification.

Assumptions and constraints are inputs that define the boundaries and conditions under which the solution will be evaluated in the business case.

The business need is a primary input to the business case because it establishes the problem or opportunity that justifies the investment being considered.