The reason ERP packages are called integrated, is the automatic data updation (automatic data exchange among applications) between related business components. Since conventional company information systems were aimed at the optimization of independent business functions in business units, almost all were weak in terms of the communication and integration of information that transcended the different business functions. In the case of large companies in particular, the timing of system construction and directives differs for each product and department/function and sometimes they are disconnected. For this reason, it has become an obstacle in the shift to new product and business classification. In the case of ERP packages, the data of related business functions is also automatically updated at the time a transaction occurs. For this reason, one is able to grasp business details in real time, and carry out various types of management decisions in a timely manner based on that information.