The answer to this question is Pyramid model. In pyramid mode, all information systems will be divided into different classes that will form a hierarchy and usually it is based on importance. The most important aspects will be placed on the top of the pyramid structure while the least important aspects will be placed on the very bottom.
The pyramid model of differentiating information system is the oldest and most commonly used system of differentiating information systems because from its origin it was built in a way that it gives priority to how important a system while classifying them.
The most relevant information system is found at the top of the pyramid and the least relevant system is found at the bottom of the pyramid.this classification makes it easy for collecting information from the systems based on relevance and also for the purpose of improving systems that are lacking in one way or the other.
