There are many sources in the economic section; some sources which we can see in any market are called regular sources, such as coffee, tissue paper, office equipment, security service, or even cleaning service. If we dissatisfy with this type of source, we can find and hire new suppliers that might be better and less expensive than the former. In order to purchase this type of source, a company just makes the policy to purchasing and supply management department by regulating the criterion to those supplements. For the sourcing strategy of this type of source, the company or department may use single sourced purchasing system, arm’s length relationship system, or even transactional relationships system.