Also look at the IREB® About page
DOWNLOAD THE REQB® APPROACH TO REQUIREMENTS ENGINEERING
The document presents a REQB® definition of the Requirements Engineering processes. The main aim is to provide the reader with a general view of the structure of the Requirements Engineering process, its inputs, outputs and specific activities. So this document provides a short introduction to the Requirements Engineering processes, their context and their relationships with other development processes.
Click on the picture to download the english PDF file (600 KB)