A KAOS modeling  Tutorial

A KAOS modeling  Tutorial

Build a model using KAOS

KAOS is a methodology for requirements engineering enabling analysts to build requirements models and to derive requirements documents from KAOS models. In this tutorial, you will learn how to build a KAOS model step by step and how to generate a requirements document based on this model. Objectiver is a tool designed to support KAOS. All diagrams in this tutorial have been generated by this tool.

The tutorial is structured as follows: • Key ideas underlying KAOS. The section introduces KAOS; it gives the main ideas and processes you have to keep in mind to build a successful requirements document with KAOS. • Analysis of a case study, where the requirements will be gathered for the design of a new elevator system. The case study will let us show you how the KAOS approach favors the identification of interesting properties and alternative unexpected designs. But you should keep in mind that KAOS can be used for any type of information system

The first key idea behind KAOS is to build a model for the requirements, that is, for describing the problem to be solved and the constraints that must be fulfilled by any solution provider. KAOS has been designed : • to fit problem descriptions by allowing you to define and manipulate concepts relevant to problem description, • to improve the problem analysis process by providing a systematic approach for discovering and structuring requirements • to clarify the responsibilities of all the project stakeholders • to let the stakeholders communicate easily and efficiently about the requirements.