The experienced or in-charge auditor position is critical to the audit engagement and provides many challenges and opportunities. This module takes a look at these challenges and opportunities and revisits a few general concepts, including materiality and audit risk, in greater depth. Further, this module looks at many facets of controls—gathering evidence, testing, timing, identifying gaps, assessing deficiencies and substantive procedures, including design, follow-up, and tests of details. This module concludes by discussing the general review of the working papers and summarizing the audit.