An ad hoc committee, composed of individuals who have studied, participated in, or been users of global change assessments, was convened to prepare this report. To inform its deliberations, the committee met with scholars who have evaluated or participated in assessments, with leaders of past assessments, and with users of assessments. For the report’s conclusions, the committee draws both from existing literature and from its examination of a relatively small but varied selection of global change assessments, each analyzing global change processes that are at least in part driven by human activities. The committee’s recommendations provide general guidance for those who conduct assessments and also, where appropriate, identify specific issues relevant to future CCSP/USGCRP assessment activities.