A facility can be mechanically complete and still be unready for safe operation. This article explores commissioning risk, including energization, hazardous fluid introduction, temporary systems, punch-list exposure, PSSR, SIMOPS, control of work, and the transition from construction to live operations.

Two tasks can each be adequately controlled in isolation and still become unsafe when they happen together. This article explores SIMOPS risk management, including shared energy sources, conflicting exclusion zones, changing work boundaries, communication overload, and the need for clear area authority.