This document provides an overview of package integrity and outlines 8 tools to help ensure package integrity at different stages from design to performance. It defines package integrity as how well a package protects its product over time from various challenges. The 8 tools include: 1) defining product protection requirements; 2) defining packaging and processing; 3) identifying distribution and storage; 4) conducting a risk assessment; 5) creating prototype packages; 6) characterizing package integrity; 7) refining package design; and 8) verifying package integrity performance. The document emphasizes understanding requirements, managing design, development and performance, and using the 8 tools which include identifying regulations and evaluating various factors.