Restructuring within an enterprise does not affect the continuity of the enterprise, but changes its structure in the process. An example could be the creation or deletion of a local unit. Restructuring may affect key characteristics such as size or principal activity. It could be argued that this is not really a demographic event at the level of the enterprise and does not impact on the demographic variables relating to the enterprise, but it could affect the way the enterpriseis included in demographic statistics. Restructuring within an enterprise group is a change (e.g. creation and/or cessation of one or more enterprises) involving more than one enterprise before and more than one enterprise after the event, where all enterprises involved are under common control. It affects the identity of at least one enterprise, though the total number of enterprises before and after the event may be the same. A typical example is the complete reorganisation of the production capacity of a large enterprise group. Complex restructuring is a similar event, but this is not constrained to one enterprise group. Restructuring within an enterprise group, or complex restructuring, may entail any number of register creations and deletions.