According to the automotive industry standards for the design of the moving line, because the shop is along the street, the washing of the United States, tyres, four-wheel alignment and fast insurance work time is short, the operation is simple, so the design of the workstation near the street side of the doorway, to facilitate fast access; mechanic and sheet metal spraying operations, because the time is relatively long, so it will be set near the back door (not along the street side), to ensure that the relevant work content each other. It is convenient to get in and out quickly to prevent congestion during peak hours, which affects business; mechanic and sheet metal spraying work, because it takes relatively long time, it is set near the back door (not along the street side) to ensure that the related operations do not affect each other. The mechanic and sheet-metal spraying operations are set near the back door (not along the street side) to ensure that the related operations do not affect each other and are carried out in an orderly manner.