When assessing industrial robots, buyers must focus on four core technical pillars: Payload Capacity, Reach/Work Envelope, Repeatability, and Degrees of Freedom (Axes). Ensure the payload accounts for both the end-of-arm tooling (EOAT) and the workpiece. For precision tasks like PCB assembly, a repeatability of ±0.02mm is standard, whereas palletizing may only require ±0.5mm. Additionally, verify the IP Rating (e.g., IP67) if the robot will operate in dusty or wet environments to prevent hardware failure.