There are several types of ERP systems that belong to the class of integrated IT systems:
- modular – they consist of independent but cooperating applications,
- integrated – consisting of one database and one business platform, where there is no data exchange between modules, because all functionalities use the same data in real time.
ERP systems basic element is the database, which is usually common to all other modules. These modules typically cover the following areas:
- warehousing and inventory management;
- tracking delivered deliveries;
- production planning;
- production service;
- customer relationship management;
- human resource management (payroll, personnel);
ERP systems may also include other modules, such as transport management, controlling or project management. ERP systems allow them to be adapted to the specifics of individual enterprises, including because individual modules can be mutually independent of each other (ie they can work without the presence of other modules).
These systems usually also allow you to set access authorizations for individual users. Another characteristic of the systems is that they allow users to perform the bottom-up replanning process, i.e. the possibility of introducing changes (making corrections, considering alternative solutions) in the solutions proposed by the system (e.g. changing the size of a delivery batch).