How to view what calculations are used for a metric on CA Data Aggregator polled items
If you want to see what a device is using for a metric for a Metric Family, look at the Vendor Certification applied to the device for that Metric Family
1) Administration->Data Aggregator.
2) Monitored Inventory->Monitored Devices
3) Find the device in the tree or via search an select it.
4) Click the polled Metric Families tab.
5) Find the Metric Family you are looking for and click the Name found under the Vendor Cert column for that Metric Family.
The Vendor Cert page lists all the calculations used for each supported metric