The review of version 1.0 of the GAMSO had a clear mandate from the HLG to only introduce changes that had a strong business case and widespread support in the international statistical community. The rationale for this approach is to avoid unnecessary disruption to organisations that may have already begun implementation of version 1.0. As a result, there are a limited number of changes to the model itself, but many more improvements, additions and clarifications to the supporting documentation.

The main changes to the GAMSO between versions 1.0 and 1.1 are as follows:

• Changes to the Capability management activity area, which has been renamed Capability development.
• The activities within the Corporate Support activity area have been re-ordered, in order to those that are most important to statistical organisations first.
• The descriptions of the activities have been updated and expanded where necessary.

It should be noted that there continues to be an overlap between certain areas of GAMSO 1.1, and some of the overarching elements of GSBPM 5.0, such as in quality management. GAMSO and GSBPM are scheduled for joint review in 2018.