This document summarizes a presentation on the development and qualification of suppliers. It discusses the importance of auditing suppliers to ensure quality and prevent issues like contamination or non-compliance. The presentation outlines key aspects of auditing like reviewing documentation, inspecting facilities, and assessing quality management. It argues audits are necessary to detect issues and ensure a safe supply chain, as systems based solely on trusting suppliers through questionnaires or virtual audits are not sufficient. The presentation closes by urging companies to prioritize quality and safety over profits to prevent irreversible harm.