Regular updating of Cochrane Overviews is very important and follows the usual process for the updating of Cochrane reviews (see Chapter 3). A Cochrane Overview will require updating whenever any of the included reviews are updated. In many cases, only minor changes to the Cochrane Overview will be required. For example, if no new studies were found in the update of a Cochrane Intervention review, only the information on the date of last update for that review would need to be changed in the Overview. However, whenever an update results in a change to the results and conclusions of an included Intervention review, the Overview will require more extensive revisions.