Summary Criteria?

Fairly novice w/running our ZCM custom reporting. Built a report that isolates our Adobe Pro/Standard installations which works fine but for reporting every single iteration of version update as unique Instance.

In other words, a workstation that's gone thru several Adobe updates i.e., and, and, and so forth is counted as a single unique instance totaling three (3). Just need a summary of these instances (one) for the given machine. Not sure if use of Summary Criteria is the solution as I don't properly know how to use it.

Any advice is appreciated.