Within the Determinations tab, when a case worker clicks on the Determination History option, the Engine displays a list of assessment determinations on the case (if any). The most recent (current) assessment determinations (if any) are displayed at the top and the remainder are superseded determinations (if any) - i.e. determinations which were "current" at some time in the past, but have been replaced due to a change which affected the case's determination result.
Recall that each determination covers the complete case lifetime, and typically includes past periods based on real-world events and predictions based on expected events. Thus each superseded determination contains the predictions about a case that the Engine made based on the known facts at the time; if facts change, then the prediction must be superseded and replaced with a more accurate prediction based on more accurate facts. The current determination represents the best prediction about the case's future eligibility and entitlement based on facts known today.