Cochrane are currently implementing an Updating Classification System (UCS) for Cochrane reviews http://community.cochrane.org/editorial-and-publishing-policy-resource/cochrane-review-management/updating-classification-system-cochrane-reviews. The idea is to inform readers whether a Cochrane Review is up to date, if it is likely to be updated in the future, or if it does not currently need updating. It can also help review groups prioritise their reviews. 

The CIS’ role in the UCS, is to run either full searches or scoping searches, to identify any new trials that would warrant an update to the review.