How did group 16.1 split?

Group 16.1, sawmilling and planing of wood, split into two classes in NACE Rev. 2.1: class 16.11, sawmilling and planing of wood, and class 16.12, processing and finishing of wood. Paragraph 140 of the manual states the split. The group title is reused as the title of the first class, and a new class carries the processing and finishing work. The split does not determine a code for a specific reader.

What does the split separate?

The split separates the primary conversion of wood, sawmilling and planing, from the further processing and finishing of wood. The first class keeps the group title, which signals that sawmilling and planing remain the core of the group. The second class, processing and finishing of wood, covers the later stages of wood preparation that the old group held together with sawmilling. The manual summary does not state the full contents of either class, and this guide does not invent a dividing line between planing and processing from the titles alone. The explanatory notes for the two classes state the inclusions and exclusions, and the notes are the authority for the boundary.

The distinction between the two classes can be illuminated, without being decided, by cross references printed elsewhere in the manual. The note for class 16.26 excludes slicing, peeling or chipping logs to class 16.11, which places primary log conversion in the sawmilling class. The note for class 16.27, finishing of wooden products, describes surface refining and protection for finished products, which is a different stage again, in group 16.2. The three notes together show a sequence of stages, from log conversion, through processing and finishing of wood, to finishing of wooden products, but the sequence is an aid to reading the notes, not a rule stated in section 4. Each note must be read on its own terms.

Why does a group level split matter?

A split at group level, into classes, changes the finest level of the classification without changing the group, division or section. The group 16.1 continues to exist, with the same title and the same place in division 16. What changes is the detail inside the group: statistics that previously reported one figure for the group can now report two figures, one for each class, where the data allow it. The change therefore increases the resolution of the statistics, without moving the group in the hierarchy. A reader comparing group level figures across versions will see continuity at group level, and a reader comparing class level figures will see a new breakdown that did not exist in the old structure.

The continuity at group level must not be mistaken for continuity at class level. There was no class 16.12 in the old structure as a separate class, and the new class 16.12 is not a renaming of an old class. It is a new class created by the split, holding content that previously sat inside the undifferentiated group. The correspondence table records how the old group content relates to the new classes, and the table entry must be read before old and new class figures are compared. Group level continuity and class level change can both be true at once, because they describe different levels of the hierarchy.

How is the split shown?

| NACE Rev. 2.1 class | Title in the manual |

|---|---|

| 16.11 | Sawmilling and planing of wood |

| 16.12 | Processing and finishing of wood |

The table follows paragraph 140. It lists the two classes and their titles, and nothing more, because section 4 states nothing more about the split. The explanatory notes for the two classes, and the correspondence table, supply the content and the mapping. This guide table is a summary of the manual summary, not a statement of either class content, and must not be quoted as one.

What does a split not decide?

Because a split is by definition not a one to one mapping, no guide in this cluster states one for a split class. One to many marks a clean split in the manual, and many to many marks content rearranged across several categories. Joint scopes appear in the table in both cases, and reading the note for each new class is still required. The entry held for a specific unit is confirmed elsewhere than this guide, by the national statistical institute or business register holding the record.

Where is a split class confirmed?

A manufacturing split is confirmed by reading the explanatory note for each new class, the correspondence table entry for the old class, and the entry held for the unit concerned, confirmed with the national statistical institute or the business register holding the record.

Keep the group continuity apart from the new class detail, read the notes for classes 16.11 and 16.12, and confirm the entry with the institute or register that holds it.