When an internal auditor receives a document displaying all the steps of a process and the path taken as transactions flow between each step, the auditor is most likely to use this document to perform an assessment of the adequacy of process controls. This flowchart or process map helps the auditor understand the process, identify key control points, and evaluate whether the existing controls are sufficient to mitigate risks within the process.
Reference:
IIA Standards: 2201 - Planning the Engagement
IIA Practice Guide: Internal Auditing and Fraud