Increased complexities of businesses require enhanced internal control tools for affected corporations. An internal audit function helps a company assess the effectiveness of its internal control system and provides internal assurance. However, it is often difficult to decide on an appropriate way of how to implement such a function. With a practical example of Company X and benchmarking three industry peers, suggestions on how an internal audit function can be implemented are made in this book. The theory presented combined with the practical process can be replicated for other corporations as well.