When sourcing a van, you must prioritize the engine displacement and fuel type (Diesel, Gasoline, or Electric) based on your local fuel costs and emission standards. Key metrics include payload capacity (kg) and cargo volume (m³) to ensure the vehicle meets your logistics needs. Additionally, verify the wheelbase length and roof height (Low, Middle, or High) as these affect maneuverability and storage efficiency. For long-term durability, ensure the chassis uses reinforced steel and the suspension system is rated for heavy-duty loads.