Apport du system usability scale à l'activité d'ergonomie d'évaluation

Today telecommunications' market has to face an great competition. This stresses the delays of commercial launches, as it is necessary to be quickly able to position on the market. Simplicity and utilisability evaluations of products or services is crucial to bring fast answers to decision-makers. Good assesment's scores will allow to minimize the risks. To answer this problem, I describe in this article a test methodology that integrates on-line questionnaire sending to users' large number, and proposes the System Usability Scale's questionnaire to produce a utilisability final score directly understandable by the decision-makers. The aim of this paper is to argue about the SUS choice, and give an example of implementation in this context.