How does impact analysis in ADDI assist during mainframe modernization?

Think of it like working hands-on with IBM mainframe systems — the answer here is 'It measures the performance impact of running ADDI scans on z/OS CPU capacity'. Impact analysis in ADDI traces backward from any artifact to show all upstream and downstream dependencies, helping teams understand the blast radius of proposed changes before they are made. On real mainframe exams, this concept comes up repeatedly so make sure you have it locked in.