When evaluating a Mobile Data Collector (PDA/Handheld Terminal), you must prioritize the Scanning Engine, Operating System, and Ruggedness. Ensure the device uses a professional 2D imager (such as Zebra or Honeywell engines) for rapid barcode capture. The OS should be Android 10 or higher to ensure compatibility with modern ERP/WMS software and security patches. Additionally, check the IP Rating (IP65 or IP67) for dust and water resistance, and ensure it has a drop specification of at least 1.2 to 1.5 meters onto concrete to survive industrial environments.