After repeated consequential battery failures, define the credible common-mode population and obtain an explicit retain, inspect, quarantine, modify, or replace disposition before accepting the remaining units.
Before a coordinated OT or controls-network change, prove the exact aggregate scope and resulting topology, then demonstrate that rollback or stabilization remains executable when the changed path is degraded or unavailable.
Use before: Startup · Functional performance testing · Integrated systems testing · Installation turnover
Sources: Microsoft Azure · National Institute of Standards and Technology
Before moving or disconnecting a UPS battery rack, prove every isolatable rack, auxiliary, and control source is isolated and control the battery energy that remains.
Use before: Installation turnover · Startup
Sources: Ministry of the Interior and Safety, Republic of Korea · YTN · Yonhap News Agency