This document defines bugs, issues, and defects and provides guidance on reporting them. It explains that bugs are errors in code, data, visualizations, requirements, or design. When reporting a bug, provide a clear title, steps to reproduce, expected and actual results. Include screenshots, logs, and attachments as needed. Bugs go through a lifecycle from new to open to resolved. Include tracing to link bugs to requirements and test cases. High-quality, reproducible bug reports help get issues addressed quickly.