In earlier versions of SLIM-Collaborate (2.0 and prior), shared workbooks were used during the Estimation Service Round Trip data exchange to store detailed estimation data and settings used in SLIM-Estimate but not stored in SLIM-Collaborate. When estimates are checked out to SLIM-Estimate, shared data from SLIM-Collaborate is augmented with this unshared data to support advanced estimation analysis in SLIM-Estimate. Shared workbooks have been deprecated and are now replaced by Associated workbooks. See also: Associated Workbooks.