Event Analysis - 8 Lessons Learned posted 2021-06-03

Eight Lessons Learned and Regional Insights posted at this link

Seven are EMS/SCADA

• LL20150604 - EMS Recovery Strategy
• LL20150901 - Loss of EMS communication due to lack of database validation of RTU configurations.
• LL20151001 - Appropriate UPS design and implementation. Review of temporary measures transitioning to permanent solutions.
• LL20151202 - Lack of QOS (Quality of Service) on network devices providing priority traffic throughput.
• LL20180802 - Firewall Failure After Time Limit Exceeded
• LL20190801 - Loss of Monitoring or Control Capability due to Power Supply Failure
• LL20190901 - Risks Posed by Firewall Firmware Vulnerabilities
• LL20200403 - Loss of Automatic Generation Control During Routine Update

One Transmission

• LL20151201 - SOL and IROL Monitoring Tool Leads to Unnecessary Manual Load Shedding