Process selection refers to the strategic decisions of selecting the kind of production process to have in a manufacturing plant. The process flow in an organization refers to how a factory organizes material flow using one or more of the process technologies including the job shop, batch shop, assembly line, and continuous flows. The process chosen depends on the customization of the product as well as the volume required in the market. The relationship between the process structures and volume requirements is depicted on a product-process matrix. As volume increases the product line narrows and specialized equipment and standardized material flows are come economically feasible. The evolution in the process structure is oft