Abstract: Requirements Engineering (RE) is an important phase in a project of systems development. It helps design-analysts to design and to model the expression of the end-user needs, and their expectations vis-a-vis their future system. This engineering is studying two major issues that are: What should the system do in order to have a complete needs specification, and reason on the why: "Why do we need to build this system? ", without looking for how to build it. The vast majority of needs engineering approaches are based on two concepts: scenario or goal; there are generally three types of approaches: Scenario-Oriented Approaches, Goal-Oriented Approaches and approaches generated by the couple: goals and scenarios at the same time. In the remainder of this paper, we present a comparative study of the three types of the RE approaches, then models of needs representation, and finally we conclude with the conclusions.

OUTFAROUIN Ahmad, ZAHID Noureddine and ABDALI Abdelmounaïm, “A Comparative Study of the Decisional Needs Engineering Approaches” International Journal of Advanced Computer Science and Applications(IJACSA), 9(8), 2018. http://dx.doi.org/10.14569/IJACSA.2018.090855

@article{Ahmad2018,
title = {A Comparative Study of the Decisional Needs Engineering Approaches},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2018.090855},
url = {http://dx.doi.org/10.14569/IJACSA.2018.090855},
year = {2018},
publisher = {The Science and Information Organization},
volume = {9},
number = {8},
author = {OUTFAROUIN Ahmad and ZAHID Noureddine and ABDALI Abdelmounaïm}
}