Build the plan around one test: if phase two were cancelled next month, could the first two theatres take patients? Every part of the schedule, the scope of supply, the commissioning records and the acceptance paperwork should be written so that the answer is yes. Phase one therefore gets its own release from the factory, its own delivery sequence, its own services and interfaces, its own test records and acceptance certificate, its own trained staff, its own spares and its own warranty start, while anything genuinely shared with phase two is either installed in full during phase one, replaced by a tested temporary arrangement with an owner and a removal date, or designed out. Phase one is not the first half of one project. It is a small hospital project of its own that happens to sit next to a second one.
Define what usable means, then write it into the master schedule for phased construction projects
Hospital tenders often describe completion as delivery, installation or equipment in place. None of those states is usable. A theatre is usable when it can go on the list and take a patient through a normal case. That definition belongs in the contract before the order is placed, not in a meeting three weeks before the first case.
Write the phase-one completion criteria around clinical activity. The table and the lights travel through their full range without striking the pendants, the walls or each other. The gas outlets and the suction deliver what the anaesthetist selects, measured at the terminal unit, and the identity of every outlet has been checked against the room’s intended use. The room holds its pressure relationship and its air change rate with the equipment installed and running. The table, the lights and the electrosurgical unit have electrical safety test records for the particular units on site, not for the type. The scrub team and the anaesthetic team have been trained on the units that were actually delivered, and the biomedical department holds the serial numbers, the manuals and the spare parts list.
Name the people who sign phase one off. A certificate a contractor issues to itself is not acceptance. The signatures that carry weight are the clinical lead for the specialty, the biomedical or clinical engineering manager, infection prevention and control, and the project manager. Agree in advance which defects block clinical use and which can be corrected later in a defined window, and keep a written list with a date against every item. Retention or withheld payment should be released against phase-one closure, not against the completion of all four theatres.
The same definition should travel through the master schedule for phased hospital construction. If the schedule shows one commissioning block at the end, the plan has already decided that phase one is not independently usable. Break the schedule into two sequences with their own readiness checks, deliveries, tests, training and handover, and show the installation dependencies between the two phases on the same page so nobody discovers them during phase two mobilisation.
Split the factory release, the paperwork and the spares before the first order
The most common way phase one ends up hostage is administrative rather than physical. One purchase order covers four theatres, one bill of materials covers both phases, and one packing list and one invoice arrive with the whole shipment. On paper the phases are a single thing, so in practice they move as a single thing. Separate them at the order stage, where separation costs nothing.
Ask for a release document per phase. That can be two purchase orders, or one order with separate release schedules, but it must produce separate packing lists, separate serial number ranges, separate shipping documents and separate certificates of origin or conformity, so your broker can clear phase one while phase two is still on the production line. Protect the phase-one manufacturing slot in writing with a stated release date, and add the rule that phase-two design changes cannot re-open phase-one drawings, re-freeze the phase-one bill of materials or delay a phase-one production release. A late decision about the third theatre’s table should never move the first theatre’s shipping date.
Spares, accessories and commissioning items belong to the phase that needs them. If the torque wrench, the calibration certificate, the spare hand control, the spare castor set or the spare battery pack ships with phase two, phase one runs its first months without cover and without a serviceable spare on the shelf. The same applies to the small items that quietly define usability: ceiling supports and cast-in fixings, brackets, rails, clamps, adapters, drapes, handles, hoses and the consumables that let a device be used on day one. List them by phase and give each item a phase tag, not just a quantity.
Finally, treat the paperwork as part of the delivery. Ask for a written scope of supply that sets out, line by line, what phase one contains and what it does not, including documentation, training, tests, spares and support, so that the boundary between the two phases is enforceable in a dispute rather than visible only in the factory’s own filing system.
Name every shared service and map its project management phase dependencies
Shared services are where two phases genuinely touch, and they are the reason a phased theatre equipment installation plan can fail after a perfect delivery. Walk the building and write down every system that both phases use, then record one of three answers for each: installed in full during phase one, replaced by a tested temporary arrangement, or designed out of phase one altogether. A shared item with no answer is a hostage.
The list in a hospital usually includes the low voltage distribution board feeding the theatre suite, the isolated power supply or medical IT system, the uninterruptible power supply, the medical gas manifold and the riser valves and alarm panels, the medical air and vacuum plant, the theatre ventilation plant and its controls, the building management system, the nurse call system, the network cabinet serving the theatre, the fire alarm zone, the sterile services capacity, and the lifts and corridors used to move patients and equipment.
Medical gas deserves its own line in the plan. If phase-two theatres tee into a riser, a valve or an alarm panel that also serves phase-one theatres, then work on that system touches a system that has already been verified for clinical use. Either give the phase-one theatres their own zones, valves and alarm panels, or make the phase-two branch connection during phase one, with the branch capped, labelled and recorded as future work. Do not let the phase-one theatre’s verified boundary include a valve that phase two will operate.
Electrical distribution creates the same trap. If a single board must be modified during phase two, the modification means a planned interruption in live theatres. Where that cannot be avoided, the plan should state the notice period, the shutdown window, the temporary supply, the order in which equipment is shut down and restarted, and which theatre absorbs the list while the phase-one theatres are dark. Ventilation follows the same logic: when four theatres share an air handling unit, phase-two duct connections, filter changes and balancing disturb a system the phase-one theatres already depend on. Schedule a re-balance and re-test of the phase-one theatres after the phase-two connection, and record the measurements against the earlier baseline.
Do not forget the human shared resource. The specialist crew that verifies medical gas or balances theatre ventilation is usually the same crew for both phases, and it will be pulled towards whichever phase is shouting loudest. Put named attendance dates for those people into the phase-one schedule, with a contractual priority for phase one until its acceptance certificate is signed.
Run room readiness and delivery as phase-one gates, not project milestones
A delivery date is not readiness. Before each phase-one delivery, the plan should require a pass or fail check signed by the site team: room complete and clean, penetrations formed and fire-stopped, structural supports and ceiling loads available, power and data tested and labelled, access route clear and protected, lifting equipment booked, and storage space allocated. Equipment should only enter the building when the room can accept it. A table that arrives before the floor finish, or while the corridor is still a site route, is exposed to damage and to a claim argument that neither side wins.
Ask for room data sheets for each of the four theatres, agreed before the order, that state what the room gives the equipment and what the equipment needs from the room: dimensions and clearances, door widths and lift capacity, structural support points and their loads, power outlets and their circuit allocation, data outlets, gas outlet positions and types, drainage, and the finished floor and wall conditions the equipment manufacturer assumes. The sheets are also the fastest way to check that the second pair of theatres is not being designed against assumptions that the first pair already proved wrong.
Custody matters as soon as goods cross the threshold. State who receives, inspects, insures and secures the equipment if delivery runs ahead of installation, require condition reports and serial number records at receipt, and name the ambient conditions in the hospital store. Then keep phase-two material out of phase-one space: not in the theatre, not in its corridors, not in its store, not in the lift it depends on. A written storage allocation per phase, with a rule that phase-two deliveries cannot occupy phase-one areas, removes a whole category of argument later.
Commission and hand over each phase on its own records
Each phase needs its own test plan, its own witnesses and its own signature. Integrated commissioning is a recorded process rather than a final walk round, and the phase-one record should be complete before phase-two installation starts, not finished at the end of the project.
Begin with installation checks and electrical safety testing of the installed medical equipment, using the in-service standard your biomedical department works to, with calibrated instruments and results filed against each serial number. Move to functional tests on each device, then to the room as an integrated system: table, lights, pendant, gas, suction, electrosurgery, and the services behind them worked together in a realistic sequence. For piped medical gas, the outlets and terminals serving the phase-one theatres should be verified and documented by the competent person before clinical use, including flow, pressure and gas identity at each terminal unit. For ventilation, measure and record the air change rate, pressure relationship, temperature and humidity in the finished room with the equipment installed and operating.
Then run a supervised trial operation on the phase-one theatres before the first elective case, with the contractor still responsible for defects found during it, and train the phase-one users on the phase-one equipment at that handover. Competency records should be signed per user, and the training should not be merged into a combined block delivered later with phase two, because the roster will release those people once and they will not come back.
The handover package belongs to the phase, not to the project: as-built and approved drawings, the asset register with serial numbers and locations, test and commissioning reports, gas verification documents, ventilation measurements, electrical test records, software versions and licences, warranty registration, the maintenance schedule, the spares list and the operating and maintenance material. This is the practical meaning of commissioning in a phased build: evidence accepted by the operator, per phase, before the next phase mobilises.
Warranty and support follow the same rule. Start each phase’s warranty at its own handover or clinical go-live, never at shipment and never at overall project completion, or the first pair of theatres will spend a large part of its cover in daily clinical use while the second pair is still being installed. Defects liability, response times for service calls and the manufacturer’s attendance obligation should all be tied to the phase-one go-live date, with a separate record for phase one.
Keep a live theatre safe while phase two is built next door
Once phase one is treating patients, phase two is construction next to a working clinical area. Dust, noise, vibration, isolation of services, hot work and deliveries through shared corridors all become clinical risks rather than schedule problems, so the plan should carry the controls as obligations with named owners.
Physical separation comes first: sealed barriers around the work, filtered negative pressure where cutting or dusty work happens, sticky mats at the entrance, vacuuming rather than sweeping, and waste removed in closed containers. Where the phase-one and phase-two theatres share an air handling unit, do not run the shared system in a way that pushes dust into a theatre that has already been cleaned and verified, and change filters before the phase-one theatre returns to clinical use. Fire performance needs the same attention: every penetration of a fire rated wall, floor or ceiling made during phase two should be sealed with a tested system and recorded, and any change to the alarm zone serving a phase-one theatre should be planned as a shutdown with the fire officer informed.
Then set the rules for stopping work. Permits for hot work and for isolation of services, a notice period before any shutdown, a named person on site who can stop the job, and a standing instruction for what happens when a phase-one theatre is needed urgently: work stops, is made safe, and is reinstated. A theatre list is not a rehearsal schedule and cannot be moved to a convenient date, so protecting a live operating theatre during phase two works means agreeing in advance which theatre takes the list when a phase-one theatre is out of service, and what the contractor owes if an accepted theatre is affected. Any interruption should be made good at the contractor’s cost, with the affected system re-verified afterwards.
Finally, give the board a single gate to watch. Phase two gets no notice to proceed until the phase-one readiness certificate is signed, and phase two gets no float out of the phase-one programme. If phase two slips, phase-one dates do not move, phase-one payment milestones do not move, and phase-one warranty does not wait. That is what keeps the first two theatres usable while the second two are being built, and it is the difference between a phased project and one project delivered in two halves.
