A process machine rarely fails at the machine. It fails at the point where the building stops doing what the machine was told it would get: pressure that sags when a neighbouring line kicks in, cooling water that arrives outside the window the process needs, power that is adequate at the panel and inadequate at the terminal, a floor route that was never planned for the panels that have to swing open. The honest answer to the question in the title is that the utilities a machine may need are decided by that machine at that position, and no published page can fix them for your shop. What a buyer can control is the list of questions asked before the enquiry, and the record of what the site can already deliver. That list is below, and it is deliberately limited to what a factory can observe on its own side of the connection.
What counts as a factory utility rather than a machine part
The line matters because it decides who is on the hook when commissioning slips. A utility is anything the site supplies up to a connection point: electrical supply, vacuum, gas or compressed air, cooling, drainage, and the room itself. Anything downstream of that point — the machine's own pump, chiller, filter, control panel, or interlock — belongs to the machine and is the supplier's problem. In practice the argument is always about the boundary, so write the boundary down for each service before anyone talks about equipment. A room with a good machine and a bad connection is a more expensive project than a room with a modest machine and a clean connection.
Power at the position, not at the panel
Record what the distribution can deliver at the position the machine will occupy, not what the intake was designed for years ago. Voltage and frequency are the easy part. The part that decides the install is capacity margin at that point, the protection arrangement, whether an isolator and a local disconnect are expected to come from the site or travel with the machine, and how loads that start under load behave alongside everything else on the same feeder. A machine with several heated or motorised stages does not draw evenly, and a feeder that looked fine on paper can run warm once those stages overlap. This is also where neutral, earthing and control-circuit arrangements belong in the same exchange: they are rarely argued about until commissioning, and they are cheap to settle on paper. If the answer is not known, the answer is a measurement at the position, not an assumption from a nameplate.
Vacuum: ask how hard, how often, and for how long
Vacuum services split a project in two, because a machine may hold its own vacuum or expect the building to make it. Where a central system is involved, three observations decide the cost: what level the process needs, how quickly it has to be reached after the chamber closes, and how often that cycle repeats in a shift. A plant that can reach a level at a test header may not reach it in the time the cycle demands while another station is open. The same is true of leak behaviour — a level that holds on a new line can drift as fittings age, and drift is what a process notices first. Whoever owns the pump, the hold valve and the relief behaviour should be named in writing, because that is where a shared header and a dedicated machine disagree.
Process gas and compressed air are not interchangeable
Buyers often treat an air line as a universal supply. For a machine involved in bonding, lamination or coating, the quality of what reaches the inlet is a process variable, not a facility detail. The questions are what the gas or air is being used for, what has to be absent from it, how clean and how dry it is between the compressor and the machine, and what the pressure does at the inlet when everything on the line is running at once. A pressure that reads correctly at the header with nothing running and sags under load is one of the commonest causes of a commissioning that passes in the morning and fails in the afternoon. Filtration, drying and the ownership of the final treatment at the machine are all site decisions, and all of them are cheaper to decide before the machine arrives than after.
Cooling is where most installation cost hides
Ask first whether the machine runs a closed circuit of its own or expects to be tied into a building loop, because that single answer changes the scope. Then ask what supply temperature the process needs and how tightly it has to be held; a loop that keeps a shop warm is not the same as a loop that holds a narrow window. Then ask about flow and about the heat the machine will reject once it is running continuously, because the figure that matters is the heat under a full cycle rather than the figure on a brochure cover. Water quality belongs on the same list: treatment, what may pass through the machine, and what happens when the supply is outside the window the machine will accept. A plant engineer who can answer these questions from their own loop does not need to be sold a chiller; one who cannot should expect a chiller in the quotation.
The room itself: ambient, particulate, disturbance
Two questions about the room decide more than any machine setting. The first is what the air does across the year at that position — including warm seasons — because a machine tuned in a cool week may not repeat the same result in summer. The second is what the process requires of the air in terms of what is floating in it, and who is responsible for meeting that requirement: the site, the machine, or both. Vibration, draught and heat rejected by neighbours are the third question, and they are the ones nobody raises until the machine is in place. A bonding or lamination position beside a press, a forklift route, or an unloaded wall behaves differently from the same position on a decoupled floor, and that difference is not a supplier failure.
Space, access, and the services nobody photographs
Footprint drawings usually state an outline, not the space the machine actually needs. Panels have to open. Load and unload paths have to exist for the material as it arrives, not as it leaves. Service reach is what keeps a machine running later, and it is the first thing sacrificed when a position is chosen by floor area. Add ceiling height and door geometry for delivery, and floor loading with whatever the slab can take without a second slab. Then photograph the parts of the room that never make it into an enquiry: cable routes that already exist, drains that are somewhere else, and the ceiling space a duct would have to pass through. Those details turn an estimate into a quotation.
Drainage, waste and what leaves the machine
A machine that uses heat, vacuum or process fluid usually produces something that has to go somewhere: condensate, purge, spent material, rinse, or vapour. The site questions are whether a drain exists at the position, what may legally enter it, whether anything has to be contained or separated before it does, and whether extraction is expected to be site work. Where a permit governs the discharge, that permit is a schedule item, not a late discovery. Waste is also a consumables question: who supplies it, who removes it, and who is told when the volume changes.
The record worth sending before any specification
A short record, kept as two columns — what the site can already deliver and what the supplier is expected to supply — settles most of these arguments before they cost anything. The rows below are labels for your own answers, not a specification; the numbers come from your building, and the supplier's answers come from your machine.
| Service | Recorded on the site side |
|---|---|
| Power | Capacity available at the position, protection, isolator ownership, how overlapping loads behave on the same feeder. |
| Vacuum | Whether the level is held at a shared header, how fast it returns after a cycle, and who owns the pump and relief. |
| Gas and air | Pressure at the inlet while other equipment runs, what treatment sits between the source and the machine. |
| Cooling | Closed circuit or building loop, supply temperature window, and the heat rejected in continuous running. |
| Water quality | Treatment in place, what may pass through the machine, and what happens outside the accepted window. |
| Room | Ambient behaviour across seasons, who meets the particulate requirement, nearby vibration and heat sources. |
| Access | Panel swing, load and unload route, service reach, delivery path and slab capacity. |
| Waste | Drain availability at the position, what may enter it, containment, extraction and permit obligations. |
Check one position at a time and stop there
A utility survey is only useful while it stays bounded. Take one position, one candidate machine duty, and the services that reach it; write the two columns; send them with the questions. Stop when the answers exist, and do not extend the survey into the machine's internals — that is the supplier's scope and mixing the two is how projects get expensive. Stop also when a row can only be answered by a measurement: put the measurement in the plan and let the quotation wait for it. The output is a short document with owned gaps, which is the thing that lets an installation date survive contact with reality.
What to send with the enquiry, and what to ask for back
Send the two-column record with the duty description and one floor sketch, and ask for the reverse record in reply: the services the machine expects, at the position, with the ownership of each boundary stated. That exchange is where a project schedule is decided, because an installation date is only credible once every boundary has an owner and every unanswered row has a measurement attached to it. A buyer who can produce both records in one round of correspondence usually shortens the whole process; a buyer who sends only a machine name is asking the supplier to guess about a building they have never seen.
The published pages for semiconductor process equipment identify machine types and, on individual cards, structural details such as chamber and tank dimensions and the materials they are built from. What they do not publish is a utility schedule, because that schedule describes your building rather than their machine. Anyone comparing equipment on dimensions alone is therefore comparing half of the information, and the other half comes from the record described above. Where the machine is one station in a line, the same reasoning runs upstream, since the interfaces between stations decide the behaviour of the line; automated production line solutions is where those interfaces are handled, and where the line itself has to be built around the room rather than the reverse, non-standard automation equipment is the route to that conversation.
