An internal auditor would like to identify the involvement of various organizational units in handling employee travel reimbursement claims. Which of the following methods would be most effective and efficient in completing this task?

Process mapping is the most effective and efficient method for this task. It provides a visual representation of a process from beginning to end, clearly documenting the sequence of activities, decision points, and, crucially, the handoffs between different individuals and organizational units. This technique creates a holistic and easy-to-understand overview, directly fulfilling the auditor's objective of identifying the involvement of various departments in the travel reimbursement claim process. It is more efficient than interviewing multiple individuals separately and synthesizing the results.

B. Interviewing: While a useful data-gathering tool, interviewing alone is less efficient. It requires synthesizing information from multiple conversations and may not reveal the complete, interconnected workflow as clearly as a process map.
C. Monitoring: Monitoring involves observing the process in real-time. It is generally used to assess performance or control effectiveness, not as a primary tool for efficiently identifying all participating units.
D. Distributing questionnaires: Questionnaires can be impersonal and may result in incomplete or misinterpreted information. They are less effective than process mapping for understanding the detailed nuances and handoffs of a specific workflow.

1. The Institute of Internal Auditors (IIA). Sawyer's Internal Auditing: Enhancing and Protecting Organizational Value, 7th Edition. 2019. Chapter 13, "Engagement Planning: Understanding the Auditee and Key Risks," Section: "Documenting Processes and Controls." This section explains that flowcharting (a form of process mapping) is a fundamental tool used by auditors to "provide a visual depiction of the inputs, activities, workflows, and outputs," which is essential for understanding departmental involvement.

2. The Institute of Internal Auditors (IIA). Practice Guide: Documenting Internal Control. December 2021. Page 6 states, "Process maps (flowcharts) are a common way to document processes because they provide a concise overview of a process, showing the relationship between inputs, activities, workflows, and outputs." This directly supports its use for identifying relationships and workflows between units.

3. Gramling, A. A., Rittenberg, L. E., & Johnstone, K. M. Auditing, 11th Edition. Cengage Learning, 2019. Chapter 6, "Gaining an Understanding of the Client's Business and Industry," discusses the use of flowcharting to document the auditor's understanding of business processes and internal controls, highlighting its value in identifying responsibilities and the flow of documents through various departments.