What kind of analysis must the BA do to determine if one of the systems...

Decision analysis is a technique that helps the BA evaluate and compare different alternatives based on their costs, benefits, and risks, and select the best option that meets the objectives and criteria. In this case, the BA needs to determine if one of the systems (Sys A or Sys B) is better suited to be modified and upgraded, based on the upgrade cost and cost new of each feature. The BA can use the table in the image to calculate the total cost of upgrading or creating new features for each system, and compare them with the expected value and return on investment of each system. The BA can also consider other factors, such as the feasibility, compatibility, reliability, and maintainability of each system, and the preferences and expectations of the stakeholders. By using decision analysis, the BA can make an informed and rational choice that maximizes the value and minimizes the risk of the solution. References:

IIBA BABOK Guide, Section 10.23, Decision Analysis

Decision Analysis for the Professional, SmartOrg

Decision Analysis: Making Justifiable, Defensible Decisions, MindTools