System integration is the unification of individual automated processes and controls together, which involves not only the use of existing systems, but also the creation of new ones.
System integration includes a certain set of works, the result of which will be the information and communication infrastructure of the organization.
The main feature of system integration is the construction of an IT infrastructure based on already functioning systems and applications. However, when analyzing the existing infrastructure, it is possible to replace outdated applications, as well as create new subsystems that combine overlapping information in various areas of the company.
Any large stationary supermarket that has an online version of the store can be taken as a simple example of an organization that does business using systems integration. Thanks to the communicating programs, you can see the presence or absence of goods, order goods, track the status of the order.