During the final review all analysts must discuss the results of the analysis of single and common cause failures. Special care must be taken to ensure that all assessments are consistent. The next stage must only be started when all analysts agree on the analysis results.
If any of the clusters has an overall vulnerability level of Ambiguous or Unknown, the analysts must decide whether or not to conduct further investigation, in order to be able to assess the common cause failures within that cluster with greater certainty. If the analysts think that the effort involved is too large, or that it will not lead to more accurate or insightful results then the component should be left as is.
If the analysts decide to redo major parts of the common cause failures analysis, then they should perform another review afterwards.