Performance measurement Dashboards

I have had a request from our operations group to develop performance dashboards where they can see how individual employees are performing on their daily jobs.

The staff members they want to start monitoring are the Picking and Packing warehouse staff. They do thier transactions through hand helds and MES

I am having difficulty finding the tables that hold these transactions with both a time stamp and user ID.

Has anyone done anything like this or know where I can find that data.

Erp.LaborDtl should be a good place to start.