With industrial inkjet printers- what is the difference between scanning printing and single pass printing?

There are two types of inkjet printing systems: scan printing and single-pass printing. In scan printing, the printhead carriage reciprocates in the sub-scanning direction (laterally in respect of the print media), making several passes to complete the image printing process. In single-pass printing, the printhead carriage remains in a fixed position and completes image printing in a single pass while the print material is conveyed underneath. Due to their high-speed printing capability, single-pass systems are coming into use in the field of industrial printing where high productivity is required.