Commissioning Management

A commissioning programme can be technically thorough and still leave the client unable to say whether the facility is ready. What is missing is rarely another test. It is an agreed statement of what the facility must demonstrate, in which states, with what load and instrumentation, and who decides whether it has. UBIK writes that statement from the design basis before the first factory visit, and the whole programme is built to answer it.

The responsibility matrix comes with it. Titles such as commissioning agent, authority, manager and provider mean different things in different contracts, so the matrix names who prepares the procedures, who provides the equipment, competent people and safe conditions, who executes, who witnesses, who resolves defects and authorises retests, and who accepts. The appointed testing parties execute the tests and keep their safety and execution responsibilities. UBIK manages the process and judges the result on the client’s behalf.

Factory acceptance tests ask whether a piece of equipment performs to its specification under controlled conditions. Site acceptance tests ask whether it performs as installed, with its real connections, controls and protection settings. Integrated systems testing asks a different question altogether: whether the facility, as one system, behaves as the design intended when things go wrong. An equipment pass at the factory says nothing about the third question.

UBIK reviews every script against the design intent and the sequence of operations before the witness. Prerequisites are confirmed: installation complete, approved procedures, calibrated instrumentation, safety controls in place, the expected response written down. Then the test is witnessed, the actual result is recorded against the expected one, and any deviation is logged and stays open until it is retested and closed.

The integrated systems test puts the facility at its design load, with load banks standing in for the IT that is not yet installed, and takes it through the scenarios the resilience objective implies:

• loss of utility and its return;
• generator start, synchronisation and transfer;
• UPS discharge, autonomy and recovery;
• each chiller and each pump out of service, in the hottest conditions the test can arrange;
• controls and BMS failover;
• the maintenance states a Tier III objective requires to be demonstrated with the load supported throughout.

The test provisions are designed in at detailed design: the load-bank connections, the instrumentation, the isolation points and the sequence that lets one scenario follow another without restarting the plant. Commissioning management therefore starts at detailed design. Started at mechanical completion, it can only inspect what exists.

The closeout report states what was demonstrated, what was not, what limitations remain and what evidence has been handed to the operator and to the certifier. A completed checklist does not explain residual risk. The report does, so that the client accepts the facility knowing what it has, and the operations team starts from the facility’s demonstrated behaviour.

Where the project is pursuing Tier Certification of Constructed Facility, the demonstrations are planned with the integrated systems test so that the facility proves its behaviour once, under witness, with the evidence filed for both purposes.