It is a good idea to have some kind of a routine in numbering. For example, number the model when you start your working day or when you finish for the day.

To save time, include the numbering series in the default part properties for each type of part before you start modeling.

Numbering is not just another way of classifying parts. To classify, use Organizer, user-defined attributes, or colors.

If you have overlapping position numbers, Tekla Structures will warn you about it.

You can have a closer look at the overlapping position numbers in the numbering history log. To display the log, click File menu > Logs > Numbering history log.