What Does Section C Cover in ISIC Rev. 5?

In ISIC Rev. 5, published by the UN Statistics Division, Section C is the manufacturing section. It covers transforming raw materials, components, and substances into new products, whether by hand, by machine, or by chemical process. It also covers assembling components into finished goods and certain related activities such as printing and reproduction. Repair of manufactured goods sits elsewhere in Rev. 5, not in Section C as a whole.

What change in the material marks the move into Section C?

The question to ask first is whether the material coming out is different in character from the material going in. A sheet of steel that leaves a plant as a washing machine has changed its character completely, even though steel is still present in the finished machine. Wheat that leaves a mill as flour has also changed, from a grain that must be processed before use into a fine ingredient ready for baking. In both cases the work is not storage, not transport, and not sale. It is a physical or chemical reshaping that creates a new product, and that reshaping is what Section C is built around in ISIC Rev. 5, published by the UN Statistics Division.

That test works across very different workshops. A plant that buys every component and bolts them together into a computer is still doing manufacturing work, because the assembled computer is a new product with a use that none of its separate parts had on their own. A workshop shaping material by hand belongs in the same broad section as a plant running the same transformation by machine, because the section sorts by the transformation itself rather than by the size of the operation or the tools on the floor. Chemical change counts in the same way, so a process that turns one substance into another through reaction sits here too, alongside cutting, shaping, and assembling.

Why do assembly and printing sit inside this section?

Assembly can look like a borderline case, especially when the assembler makes nothing from scratch. The reason it stays in Section C is that the finished good is the point of the work. Buying parts, fitting them, testing the result, and sending out a working machine is a production sequence, not a distribution sequence. The parts arrive as inputs and leave as something else, and that is the same pattern as milling wheat or rolling steel, only with more bought-in pieces and fewer raw materials at the start.

Printing and reproduction sit here for a related reason. Printing turns blank paper and ink into books, newspapers, journals, and labels, which are new physical products. Reproduction copies recorded material onto discs, tapes, and similar media, again producing a tangible item that did not exist before the run. Repair, by contrast, returns an existing good toward its earlier condition rather than creating a new product, and Rev. 5 places repair of manufactured goods elsewhere. Keeping that distinction in mind prevents a repair workshop from being read as a factory simply because both handle machines.

How does one activity in a mixed business get read?

Real businesses rarely do one thing. A firm may mill flour, bake bread, and run a shop from the same premises, or assemble computers while also selling spare parts. ISIC Rev. 5, published by the UN Statistics Division, aims for headings that are mutually exclusive in principle, which means each heading is written so that, in theory, a given activity belongs in one place rather than in several at once. In practice, a mixed business has to be read activity by activity, asking which transformation or assembly step is being described before reaching for a heading.

The practical route is to narrow slowly through the UNSD structure, from section to division to group to class, checking the description at each level against the work in question rather than stopping at a familiar heading title. National guidance often adds local examples that show how the international headings are applied in that country, and for a business register entry the register itself is the final check. Copying a heading from a similar sounding business is a weak shortcut, because two businesses with similar names can be doing quite different work in day-to-day trading.

This guide explains Section C in general terms only. It is statistical classification information, and it does not settle any reader’s own code, principal activity, or registration entry. Anyone who needs a formal answer should compare the work in question with the UNSD Rev. 5 descriptions and then ask the national statistical institute or business register that holds the record to confirm it.