The metric you will most need to be familiar with is the CUAT process, kind of a USR for the ANA. However, it does not measure performance and under-rates many tactical units because logistical shortfalls are often out of their control (Kabul issues), but are able to execute missions well.

For example, 1/205 ANA recently executed Mi-17 flown Air Assaults, planned, coordinated, and rehearsed by them. They did it very well. They are able to do Brigade level planning. However, like all ANA, equipment, maintenance, and supply shortfalls hold them back. But they are able to take it to the Taliban effectively.

The subjective assessment you will make as an adviser, backed up by your battlespace owning unit, will be the real metric your embedded unit will be based upon.