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This paper aims to reveal the most common strategies students use to create class designs. We show our approach of logging students' modelling activities while doing a software design task. We developed our own online modelling editor 'Web UML' and visualisation tool 'Log Viz' for the logging and interpretation of the log files. As follow-up students filled-in a brief questionnaire targeting their...
This paper presents a study into the accuracy of different dimensions of IT project estimating: schedule, budget & effort. The study is based on a dataset of 171 projects that have been collected at the IT-department of a large Dutch multinational company. The paper also analyses whether there is any learning (improvement) effect over time. Our results show that there is no relation between...
Model driven development (MDD) is a software engineering practice that is gaining in popularity. We aim to investigate to what extend it is effective. There is a lack of empirical data to verify the pay-offs of employing MDD tools and techniques. In order to increase the knowledge we have of the impact of MDD in large scale industrial projects, we investigate the project characteristics of a large...
Optimizing IT investments in alignment with key business drivers is a challenge for all organizations. Organizations need to prioritize and select a portfolio of IT projects that provides optimal benefit and balances utility, risk, and resources. This paper reports on an exploratory empirical study into the processes and project-selection criteria used by several large companies. The objective of...
In this exploratory case study, effort distribution visualizations of industrial software development projects are made in order to assess to what extent patterns can be found that describe the nature of the distribution of effort. The visualization of effort distributions of two rational unified process (RUP) projects are presented and discussed. Data was collected from hour registration systems,...
Correspondence between the design and the code of a system is desirable for several purposes in software development, such as predicting properties of the system based on the design, and for using the documentation for understanding and maintaining the system. In this paper we report on a study into the correspondence between the design of a software system, represented by means of UML, and the implementation...
UML sequence diagrams describe the interaction between objects of a system. In this paper, we present four approaches to analyze the quality of sequence diagrams. First, we propose formal model checking techniques and visualization to analyze the possible interaction traces and to identify ambiguities in a sequence diagram. Second, we identified patterns of common interactive behavior and we present...
Software development is becoming more and more model-centric. As a result models are used for a large variety of purposes, such as quality analysis, understanding, and maintenance. We argue that the UML and related existing tooling does not offer sufficient support to the developer to understand the models and evaluate their quality. We have proposed and implemented a collection of views to increase...
The Trust4All project aims to define an open, component-based framework for the middleware layer in high-volume embedded appliances that enables robust and reliable operation, upgrading and extension. To improve the availability of each individual application in a Trust4All system, a runtime configurable fault management mechanism (FMM) is proposed, which detects deviations from given service specifications...
Security in component-based software applications is studied by looking at information leakage from one component to another through operation calls. Components and security specifications about confidentiality as regular languages are modelled. Then a systematic way is provided to synthesise an access control mechanism, which not only guarantees all specifications to be obeyed, but also allows each...
The Trust4All project aims to define an open, component-based framework for the middleware layer in high-volume embedded appliances that enables robust and reliable operation, upgrading and extension. To improve availability of each individual application in a Trust4All system, we propose a runtime configurable fault management mechanism (FMM) which detects deviations from given service specifications...
This paper presents a compositional performance analysis technique, enabling predictable deployment of software components on heterogeneous multiprocessor architectures. This analysis technique introduces (a) composable software and hardware component models representing abstract specification of the component behaviour and corresponding resources, (b) operational semantics enabling composition of...
We present MetricView, a software visualization and exploration tool that combines traditional UML diagram visualization with metric visualization in an effective way. MetricView is very easy and natural to use for software architects and developers yet offers a powerful set of mechanisms that allow fine customization of the visualizations for getting specific insights. We discuss several visual and...
With the advent of UML and MDA, models play an increasingly important role in software development. Hence, the management of the quality of models is of key importance for completing projects succesfully. However, existing approaches towards software quality focus on the implementation and execution of systems. These existing quality models cannot be straightforwardly mapped to the domain of UML models...
Inconsistencies between software views are a source of errors for software systems. In this paper we present a general approach that aids in finding inconsistencies between different views. This approach supports both intra phase consistency checking and inter phase consistency checking. The approach is suitable for detecting consistency problems between, for example, multiple diagrams in a UML design...
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