Impact Analysis is the process that maps the result(impact) of a proposed change, and on the basis of that it is decided what the best global solution is to execute the change.

Design is the process with aim on setting up and save the user specifications of an information system or modifications thoroughly, so that it can be carried through and tested in an unambiguous way.

The aim of the process of Realization is to translate the specifications derived from the Design process into concrete(actual) and correct changes in the automated information system.

Testing is the process containing the elements to determine, that what was designed, has indeed been actualised. Testing also determines whether after Realization the application will be administrable and exploitable.

Implementation is the process that covers all the activities that have to be performed to bring the change proposals from change management, for use and data processing, in effect. The objective of implementation is the filling of important preconditions to result in a problem free use of the new version of the application and completion of the maintenance process.