Which of the following steps is required to validate a business case?

Feasibility analysis evaluates whether a proposed project is technically, economically, legally, and operationally viable, directly contributing to the validation of its business case by confirming its practicality and potential for success. This step helps stakeholders understand the risks and chances of successful implementation.

Assigning costs is part of detailed financial planning, which occurs after the business case is validated and approved.

Scheduling milestones is a part of project planning and scheduling, which follows the validation and approval of the business case.

Identifying project scope is an initial step in defining the project, which often precedes or is part of developing the business case itself, rather than validating it.