How are utilities distinguished from construction in ISIC Rev. 5?

Utilities are distinguished from construction in ISIC Rev. 5, published by the UN Statistics Division, by asking whether the work is operating a supply service or building the asset that will later be operated. Supply means running networks, plants and systems that deliver electricity, gas, water or waste services on an ongoing basis. Construction means building, installing or completing structures and systems, after which the builder hands the asset over. A firm can do both kinds of work, but the classification describes each activity separately, and a register record follows the principal activity rule applied by the statistical office, not this guide.

What does an operating week look like, compared with a building week?

An operating week repeats. Pumps run, networks are monitored, treatment works process flows, and users receive a service day after day. A building week progresses toward an end point: foundations are laid, pipes are laid, a plant is assembled, tests are run, and then the asset is handed over. The same physical asset can therefore appear in two statistical stories at different times in its life. During construction it is the output of building work. Once it is running, it is the instrument of a supply service. The classification follows that change in the work itself, not the concrete or steel that stays put.

That time dimension helps with the hardest cases. Suppose a team spends a month replacing a long stretch of pipe inside an existing network. Is that operating the network, or is it a construction project? The answer in statistical practice turns on whether the work is part of keeping the service running or a distinct project that creates or substantially renews an asset. Contract wording alone will not settle it. The full Rev. 5 explanatory notes and national guidance need to be read, because they describe how operating and project work are separated when the same crew, the same pipes and the same network are involved.

Which kinds of work illustrate each side?

The following kinds of work are described in ISIC Rev. 5, published by the UN Statistics Division, in connection with this distinction:

• Ongoing operation of a utility network
• Generation and distribution of a utility
• Treatment and supply through an existing system
• Building of power plants, pipes and plants
• Installation work that creates a new asset

Read the first three items as the continuing service side and the last two as the asset creating side. That list is an orientation aid, not a substitute for the full class description. Where an activity in utilities versus construction seems to fit a heading but not the detail, the detail in the Rev. 5 publication should prevail, and the national institute should be consulted for a formal record.

Why can one firm appear on both sides without contradiction?

Real firms rarely do one thing only. A water company may operate a network year after year and, in a separate project, build a new reservoir. Statistically that is not a contradiction and it is not a loophole. It is two activities performed by one unit at different times or in different teams. The classification describes activities, so a multi activity firm is described activity by activity. What a register record shows for such a firm then depends on the principal activity rule applied by the statistical office, which weighs the whole unit. This guide does not apply that rule to any reader, because it cannot see the firm’s overall balance of work.

How is this distinction organised inside Rev. 5?

For utilities versus construction, Rev. 5 from the UN Statistics Division runs from broad sections down to narrow classes. For utilities versus construction, think of a section as the broad field, a division as narrower, a group as narrower still, and a class as a specific kind of activity. Reading a code therefore means reading each level in turn, rather than guessing from a section letter alone. National versions may add further detail below the class, but the international structure provides the shared frame that lets similar work be counted together across countries, even when it happens inside differently organised firms.

What should a reader check before relying on this distinction?

Use this guide as orientation to ISIC Rev. 5, published by the UN Statistics Division, and keep its limits in view. A description here cannot settle whether a particular project counts as construction or operation, and it cannot serve as a licence, a permission or a tax decision. Those questions belong to the holders of the relevant records and to the regulators for the field.

On utilities versus construction, the code statements here follow the UN Statistics Division classification detail and the ISIC Rev. 5 publication in the frontmatter.

In short, treat everything above as statistical background only: it does not determine your code, it does not pick your principal activity, and it does not complete any registration. For any of those, confirm with the national statistical institute or business register that holds the record.