Security Issue Security is the most important matter. Security issue can may cause data violation and reputation problem. 2 Data-loss prevention Data loss is one of the worst issue that may cause business continuous concern, and reputation issue. 3 Availability, Incident Corrective Actions Service unavailability should require high attention. 4 Regression Issue, Functional Bug Things that worked before, or working unintended way. 5 Performance Improvement Performance of existing functionality directly impacts to UX. 6 Issue prioritized by special request Something requested by key customer or management. 7 System Monitoring/Alerting Monitoring or instrumentation related such as Logging, Tracing, Monitoring 8 New Features, Tech Debt, Usability Improvement UI/UX issue for existing functionality. Belong で実際に利用する開発優先順位ガイドライン 今回の話は #8 の新機能などの優先順位付けが主になる