Enhanced model for Usability Requirements D 7 Elicitation

Abstract

Introduction: Usability is one of the most important aspects of requirement engineering .The HCI community has developed guidelines and recommendations for improving the usability system that are usually applied at the last stages of the sofiware development process. On the other hand, the software engineering community has developed methods to elicit functional requirements in the early stages, but usability has been relegated to the last stages together with other non- functional requirements. Therefore. there are no methods of usability requirements elicitation to develop software within both communities. This thesis details a framework that looks at how to deal with certain usability features in the early software development stages. A Model contains five steps that should be achieved in order to elicit the usability requirement as the non-functional requirement. A case study has been conduct to test and evaluate the proposed method. Results indicate that such model will aids to increase the developer's awareness toward usability and there for better usability feature and higher user satisfaction could be accomplished. Methods: A survey study (Questionnaire and interview) has been used to study and investigate a particular community (Developers) also SPSS version 2] has been used to analyze the data of the Questionnaire. Results: this result was reached by the survey study and found that (88.4%) of the sample under study (Developers) haven’t any specific guidelines to deal with NFRs and especially usability. The evaluation was conducted to the proposed model is testament to how important guidelines of usability and the difference is clear and visual between the system in the first level and the second level. The proposed an approach for elicitation process helped to elicit usability requirements and less time consuming way to identify usability functionality. Discussion: There are some limitations related to Requirements Engineering knowledge spicily the requirement type and method to elicit it and Human-Computer Interaction (HCI). Also Companies that develop software system and developer have less method to elicit usability requirement as non-functional requirement and there is no specific guidelines to deal with non-functional requirements especially usability requirements.