—For accepting clouds and using cloud services by companies, security plays a decisive role. For cloud providers, one way to obtain customers' confidence is to establish security mechanisms when using clouds. The ISO 27001 standard provides general concepts for establishing information security in an organization. Risk analysis is an essential part in the… (More)
We present a model-and pattern-based approach that allows software engineers to take quality requirements into account right from the beginning of the software development process. The approach comprises requirements analysis as well as the software architecture design, in which quality requirements are reflected explicitly.
Design decisions should take quality characteristics into account. To support such decisions, we capture various solution artifacts with different levels of satisfying quality requirements as variabilities in the solution space and provide them with rationales for selecting suitable variants. We present a UML-based approach to modeling variability in the… (More)
Affecting multiple parts in software systems, security requirements often tangle with functional requirements. In order to separate crosscutting concerns and increase modularity, we propose to represent security requirements as aspects that can be woven into functional requirements. Using problem frames to model the functional requirements , weaving is… (More)
We propose in this paper an iterative method composed of three steps to derive architecture alternativesfrom quality requirements using acatalogue of patterns and styles. The solution candidates are chosen by answering aset of questionswhich reflects the requirements. We instantiate then the solution candidates using aU ML-based enhancement of the problem… (More)
Many problems might arise when performance requirements are not taken into account from the beginning of software development. Architectural solutions such as performance patterns represent design decisions on the architecture level that might constrain quality requirements significantly. Knowledge which is gained in the solution space, for example from… (More)
The design of software architecture for a system-to-be is a challenge, since required functionality as well as the desired quality requirements have to be considered. Building upon common knowledge and best practices captured in architectural patterns has shown to be valuable in this context. However, existing solutions for deriving architectures from… (More)