The first activity that should be performed when the time required to complete daily processing for a legacy application is approaching a risk threshold is to conduct a root-cause analysis. This will help to identify the source of the problem and the factors that are contributing to the increased processing time. By conducting a root-cause analysis, the enterprise can determine the most appropriate and effective solution to address the problem and prevent it from recurring. Temporarily increasing the risk threshold, suspending processing to investigate the problem, and initiating a feasibility study for a new application are not the first activities that should be performed, as they may not resolve the underlying issue and may introduce additional risks or costs. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.2.1.2, page 193.