Along with recent trends in using goal-oriented approaches for requirements engineering and system development activities, various techniques for managing adaptable stakeholder goals and requirements are proposed and used by the software engineering industry. Enterprise Architecture (EA) models which tie business goals, business processes and supporting IT systems are also expected to support reasoning on impact of changes on goals and requirements. Unfortunately common Enterprise Architecture (EA) frameworks like The Open Group Architecture Framework (TOGAF) and EA modeling languages like Archimate lacks support for analyzing goal and requirement change impacts in EA goal models. This paper reports an effort to fill this gap by extending a metamodel of already existing requirements and goal modeling language. The extension adds semantically reach definitions for goal influence relations that support reasoning on these relations. To leverage existing change impact analysis techniques, a literature review was conducted on existing goal change management techniques. Two candidate approaches (TROPOS and NFR framework) were chosen from the review results based on comparative analysis study. However, there is no evidence suggesting which of these two approaches suits more for EA goal model analysis. To find empirical evidence on the applicability of these approaches, we develop an adapted algorithm as well as a tool support for both techniques and apply both approaches on an industrial case study. Two main lessons were learned from the result of the case study. First both approaches have some limitations when applied to EA goal analysis and second, the NFR/Fuzzy logic based approaches provide more concrete results than the TROPOS based approaches.

Abstract. [Context and Motivation]As a result of recent trends in enhancing Service Oriented Requirement Engineering activities, a number of service description methods have been proposed for describing services. The availability of different service description methods can give developers a range of options to choose from so that they can have an appropriate description method that fits best their services. [Question/problem] But there is neither holistic information on service description methods nor a clear understanding of the strengths and weaknesses of each service description method. The aim of this paper is to identify problems of service descriptions that have been researched so far, and the techniques or methods available to tackle these problems. [Principle ideas/results] Thus, to gather this relevant information available in the literature, a systematic review was conducted. A total of 191 articles were examined, of which 24 articles focus on service description related concepts. The results show that, despite the recent efforts in describing the nonfunctional requirements of services through approaches like semantic annotations and policy attachments, there is still a lot to do in enhancing the description of quality aspects of services. Furthermore, this study reveals that a negligible effort is given to the description of consumer oriented services.[Contribution] This paper identifies and analyzes the current service description methods that exist in the literature and explains the pros and cons inherent to these methods