This document provides an overview of internal quality auditing techniques and common ISO 9001 requirements. It discusses using a process approach and PDCA cycle in audits. Interview skills like questioning techniques and taking notes are covered. Creating checklists and potential issues with "cheat sheets" are also summarized. The document reviews writing audit reports and addressing nonconformities. It identifies some of the toughest ISO 9001 clauses to audit and the most common nonconformities found in internal and registrar audits.