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STO

STO — Startup and Turnover

The structured process of transferring completed facilities from construction to commissioning, startup and operational ownership.

Definition

Startup and Turnover (STO) is the coordinated process through which completed facilities, systems and documentation are progressively transferred from construction to commissioning, startup and operational ownership. Startup and Turnover activities verify that systems are complete, tested, documented and ready for safe operation while ensuring an orderly transition to the operating organization.

Why It Matters

Startup and Turnover manages the structured transfer of completed facilities from construction through commissioning into operations.

In Practice

Startup and Turnover integrates construction completion, system handover, commissioning, operator training, documentation verification and operational acceptance to achieve a safe and efficient transition into service.

Common Misuse

Startup and Turnover manages the transition from project delivery into operations, whereas Mechanical Completion confirms that construction work has been completed for a defined system or asset.

Term Details
Synonyms:
STO; Startup and Turnover; System Turnover; Operations Handover
Classification:
Commissioning
Methodology
Advanced
Applications

Commissioning; Project Management; Operations.

Where It's Used

Oil and gas.; Petrochemical.; Power generation.; Manufacturing.; Infrastructure.

References

NORSOK Z-007; ISO 55001

See It In VisualAIM

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