FOR Commissioning contractors, project owners, and startup managers
Define commissioning activities and authority
Commissioning can involve inspection, functional testing, energization, introduction of process material, and verification of performance. Describe the actual tasks and identify who directs each activity. A consultant witnessing tests and a contractor operating equipment during startup may face different exposures.
Create a milestone schedule covering mechanical completion, testing, partial acceptance, and commercial operation. Identify the party responsible for the equipment at each point. Insurance transitions should follow these facts rather than a single projected completion date that may no longer reflect the way the project is being handed over.
Examine testing provisions and property interests
Review the proposed construction and operational policies for testing, commissioning, and startup conditions. Ask how phased handover, previously accepted equipment, and damage involving both old and new assets are treated. Do not assume a builder’s risk policy remains unchanged throughout every startup activity.
Identify equipment supplied by others, temporary test equipment, consumables, and property in the contractor’s care. Compare the owner’s and contractor’s arrangements. Obtain written clarification before testing begins if the scope, duration, or operating conditions differ from the original submission, since the transition can materially affect underwriting assumptions.
Separate technical advice from performance promises
Commissioning firms may provide professional judgments as well as physical services. Review whether professional liability, general liability, and project insurance are intended to address different aspects of the work. Examine the definition of services and any restrictions relating to design, testing, or performance.
Counsel should review guarantees, acceptance criteria, indemnity, and obligations for delay or failed output. A policy should not be presented as guaranteeing that equipment will achieve contractual capacity or efficiency. Ask the broker to identify where insured allegations may differ from obligations arising solely from a commercial performance promise.
Document the handover and unresolved items
Prepare commissioning plans, contracts, schedules, equipment values, testing responsibilities, and loss information. Keep records of exceptions, corrective work, acceptance, and changes to test conditions. These records help establish the facts if damage occurs during a transition between project phases or between contractors.
Before commercial operation, confirm the intended operational insurance start date and the status of remaining construction activities. Record any unresolved exclusions, conditions, or reporting requirements. A coordinated handover review reduces reliance on assumptions, while engineering approval and safe startup remain responsibilities of qualified project personnel.
For phased startup, identify which equipment is already supporting commercial operation while other equipment remains under test. A loss may involve both groups, making the status of each item important. The handover record should therefore be detailed enough to explain the timing and scope of acceptance, rather than relying only on a single certificate issued for the overall project.
Questions for your next review
- Who directs and performs live testing?
- When does construction coverage end and operational coverage begin?
- Are performance guarantees distinct from insured professional services?
Related Montridge webinars
EPC, contracts and commercial coverage
Delay in Startup (DSU) Insurance Explained | Builder's Risk, Infrastructure & Project Management
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Bring the operational details above into a coordinated review of your contracts, loss history and actual policy wording. Explore Montridge EPC insurance services for the related brokerage service.
Source references
Primary-source background informs the technical discussion. Insurance review questions are educational interpretation; a source link does not establish coverage or certify compliance.
Prepared November 1, 2026. Confirm current requirements and their application to your work before relying on them. Specific insurance outcomes require review of the complete policy and endorsements.

