Explanation
According to the BABOK® Guide, a business analyst (BA) should assess the capability gaps between the current and the future state of the organization, and determine the scope of the change required to achieve the desired outcomes. A capability gap is the difference between what an organization can do and what it needs or wants to do. To assess the capability gaps, the BA should evaluate the current capabilities of the organization, such as the processes, systems, people, and resources, and identify the areas that are affected by the business need or problem. In this scenario, the BA is working on an effort to upgrade a system to take advantage of new technology. Most of the end users with the business knowledge and IT staff with technical knowledge of the system are no longer with the company. This means that the BA has limited sources of information about the current state of the system and its users. Therefore, the BA should evaluate the number of business areas impacted by the system upgrade, as this can help the BA to better understand the extent of the effort required to implement the change. The BA can use techniques such as document analysis, observation, or reverse engineering to gather information about the current system and its users, and to identify the stakeholders, requirements, and risks involved in the system upgrade. References:
[BABOK® Guide], section 5.1: Assess Capability Gaps
CCBA Exam Questions & Answers with Explanations, question 421