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The objective of our research is to define a requirements model for Adaptive Multi-organizational Systems. Our work considers the functional complexity of contemporary internet-based, multi-organizational systems. Not only the business functions, but also the interactions between the components of such systems are highly dynamic and global. Furthermore, these systems function in extremely uncertain...
Continuous Delivery (CD) has emerged as an auspicious software development discipline, with the promise of providing organizations the capability to release valuable software continuously to customers. Our organization has been implementing CD for the last two years. Thus far, we have moved 22 software applications to CD. I observed that CD has created a new context for architecting these applications...
The advent of cloud computing has offered to developers a new appealing paradigm to deploy their applications without capital investments. Resources can now be acquired on-demand in a flexible, scalable and rapid way. However, cloud providers lack of native mechanisms to guarantee the Quality of Service required by specific application domains. High availability can be achieved by replication of critical...
The process for choosing the best architectural elements to build systems has become increasingly complex. It becomes more critical if it is necessary to consider many combinations of components in the context of an architectural configuration. This paper proposes an approach for the dynamic selection of architectural configurations based on quality of system criteria of the system, which can be used...
Modern software systems are increasingly requested to be adaptive to changes in the environment in which they are embedded. Moreover, adaptation often needs to be performed automatically, through self-managed reactions enacted by the application at run time. Off-line, human-driven changes should be requested only if self-adaptation cannot be achieved successfully. To support this kind of autonomic...
The performance of a software system has been a major concern of the information technology services industry since its inception in the early 1960's. Up to now, simulation has been a key technique for gaining an understanding of the performance characteristics of the system during development time, while software tools, possibly together with manual operations, have been used to monitor some performance...
We focus on non-functional requirements for applications offered by service integrators; i.e., software that delivers service by composing services, independently developed, managed, and evolved by other service providers. In particular, we focus on requirements expressed in a probabilistic manner, such as reliability or performance. We illustrate a unified approach-a method and its support tools-which...
This paper presents an approach for embodying nonfunctional requirements (NFRs) into software architecture using architectural tactics. Architectural tactics are reusable architectural building blocks, providing general architectural solutions for commonly occurring issues related to quality attributes. In this approach, architectural tactics are represented as feature models, and their semantics...
The growing trend toward developing complex software systems has highlighted the need to build software Non-Functional Requirements (NFR) into the system model. This research proposes a Multi-Agent Systems (MAS) approach in Reactive Autonomic Systems (RAS) whose architecture, configuration, and self-monitoring of the NFR at runtime are specified in a single formal framework. The proposed Reactive...
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