A major benefit of enterprise resource planning systems is that data is centralized. All the departments in the organization use and have access to the same database, so when a particular value is changed by one department, every other department receives the updated value. For this reason, enterprise resource planning systems help to coordinate complex organizations.
This means that they are really only appropriate for medium and large businesses. Because enterprise resource planning systems are so complex, they are difficult to adjust. Also, they create a system to be used by the entire organization, so data may not be updated for different functions.