A product, from demand to delivery, must go through two stages: design and manufacturing. At present, the more mature reliability ideas in the academic circle are all aimed at the design stage. However, there is not enough research on the reliability of manufacturing process. Manufacturing process reliability can be defined as the ability of equipment (production line, process system, etc.) to maintain the indicators that guarantee product quality under specified time and environment. Its basic connotation is to control and improve some process indicators in the equipment (production line, process system, etc.), so that the product can meet the specified reliability requirements.