1. How are internal audit assurance engagements related to senior management's assertions regarding the organization's system of internal controls? 2. When and in what ways do assurance engagement communications occur? 3. What distinguishes a significant observation from an insignificant observation? What distinguishes a material observation from a significant deficiency? 4. Why is interim and preliminary communication important in an assurance engagement? 5. What information should be included in a well-designed final assurance engagement communication 6. What actions regarding assurance engagement observations must the internal audit function take after the final engagement communication is disseminated