When evaluating a dumpling machine, prioritize the production capacity (pieces per hour), which typically ranges from 500 to 10,000 pcs/h. Ensure the machine features adjustable dough thickness and filling volume to accommodate different recipes. Look for food-grade stainless steel (SUS304) construction to ensure durability and hygiene. Additionally, check if the machine uses independent frequency conversion control for the dough and filling systems, as this allows for more precise texture management.