Assessing composition in modeling approaches

Modeling approaches are based on various paradigms, e.g., aspect-oriented, feature-oriented, object-oriented, and logic-based. Modeling approaches may cover requirements models to low-level design models, are developed for various purposes, use various means of composition, and thus are difficult to compare. However, such comparisons are critical to help practitioners know under which conditions approaches are most applicable, and how they might be successfully generalized and combined to achieve end-to-end methods. This paper reports on work done at the 2nd International Comparing Modeling Approaches (CMA) workshop towards the goal of identifying potential comprehensive modeling methodologies with a particular emphasis on composition: (i) an improved set of comparison criteria; (ii) 19 assessments of modeling approaches based on the comparison criteria and a common, focused case study

Refactoring-Safe Modeling of Aspect-Oriented Scenarios

Aspects use pointcut expressions to specify patterns that are matched against a base model, hence defining the base locations to which aspects are applied. The fragile pointcut problem is well-known in aspect-oriented modeling, as small changes in the base may lead to non-matching patterns. Consequently, aspects are not applied as desired. This is especially problematic for refactoring. Even though the meaning of the model has not changed, pointcut expressions may no longer match. We present an aspect-oriented modeling technique for scenarios that is refactoring-safe. The scenarios are modeled with Aspect-oriented Use Case Maps (AoUCM), an extension of the recent ITU standard User Requirements Notation. AoUCM takes the semantics of the modeling notation into account, thus ensuring pointcut expressions still match even after, for example. refactoring a single use case map into several hierarchical maps. Furthermore, AoUCM allows the composed model to he viewed Without having to resolve complex layout issues. The general principles of our approach are also applicable to other aspect-oriented modeling notations

An aspect-oriented framework for business process improvement

Recently, many organizations invested in Business Process Management Systems (BPMSs) in order to automate and monitor their processes. Business Activity Monitoring is one of the essential modules of a BPMS as it provides the core monitoring capabilities. Although the natural step after process monitoring is process improvement, most of the existing systems do not provide the means to help users with the improvement step. In this paper, we address this issue by proposing an aspect-oriented framework that allows the impact of changes to business processes to be explored with what-if scenarios based on the most appropriate process redesign patterns among several possibilities. As the four cornerstones of a BPMS are process, goal, performance and validation views, these views need to be aligned automatically by any approach that intends to support automated improvement of business processes. Our framework therefore provides means to reflect process changes also in the other views of the business process. A health care case study presented as a proof of concept suggests that this novel approach is feasible

A vision for generic concern-oriented requirements reuse

Reuse is a powerful tool for improving the productivity of software development. The paper puts forward arguments in favor of generic requirements reuse rooted in the vision that effectiveness requires a focus on coordinated composition of reusable artifacts across the whole software development life cycle. A survey of publications on requirements reuse from the International Requirements Engineering (RE) Conference series determines the research landscape in this area over the last twenty years, assessing the hypothesis that there is no or little research reported at RE about generic reuse of requirements models that spans the software development life cycle. The paper then outlines, for the RE community, a research agenda associated with the presented vision for such an approach to requirements reuse that builds on concern-orientation, i.e., the ability to modularize and compose important requirements concerns throughout the software development life cycle, and model-engineering principles. In addition, early research results are briefly presented that illustrate favorably the feasibility of such an approach.Ye

Visualizing early aspects with use case maps

Once aspects have been identified during requirements engineering activities, the behavior, structure, and pointcut expressions of aspects need to be modeled unobtrusively at the requirements level, allowing the engineer to seamlessly focus either on the behavior and structure of the system without aspects or the combined behavior and structure. Furthermore, the modeling techniques for aspects should be the same as for the base system, ensuring that the engineer continues to work with familiar models. This paper describes how, with the help of Use Case Maps (UCMs), scenario-based aspects can be modeled at the requirements level unobtrusively and with the same techniques as for non-aspectual systems. Use Case Maps are a visual scenario notation under standardization by the International Telecommunication Union. With Use Case Maps, aspects as well as pointcut expressions are modeled in a visual way which is generally considered the preferred choice for models of a high level of abstraction

A workshop for integrating UML modelling and agile development in the classroom

Students have various difficulties with software modelling, the software development process and with positioning modelling as a means to support their software development. The Agile methodology Scrum has gained popularity in industry and also amongst students. Unfortunately agile projects often lack adequate documentation. Modelling and the agile process could complement each other. The combination of modelling and agile development is not often used in education. Based on our positive experience with the interactive LEGO4SCRUM workshop we use in our programs, we propose an approach based on this workshop that integrates UML modelling into the Scrum process. The workshop lets students experience a whole development cycle from a modelling perspective. Besides this new approach we also categorized comments students wrote down based on their discussions with their peers. We evaluated the workshop with a questionnaire. The students react positive on the approach and indicate they have gained new insights. This paper explains the workshop set-up, presents its evaluation and discusses the results. \ua9 2016 ACM

Formalizing patterns with the user requirements notation

Patterns need to be described and formalized in ways that enable the reader to determine whether the particular solution presented is useful and applicable to his or her problem in a given context. However, many pattern descriptions tend to focus on the solution to a problem, and not so much on how the various (and often