Blockchain is an emerging technology for decentralised and transactional data sharing across a large network of untrusted participants. It enables new forms distributed software architectures, where agreement on shared states can be established without trusting central integration point. A major difficulty architects designing applications based blockchain that the has many configurations variants. Since blockchains are at early stage, there little product or reliable evaluation available to...

Despite advances in clarifying high level design needs, analyzing a system's ability to meet desired quality criteria is still difficult. The authors propose using scenarios make analysis more straightforward. In their case study report, they analyze lessons learned with this approach. They developed the Software Architecture Analysis Method, an approach that uses gain information about attributes. Scenarios are brief narratives of expected or anticipated system from both user and developer...

While software architecture has become an increasingly important research topic in recent years, insufficient attention been paid to methods for evaluation of these architectures. Evaluating architectures is difficult two main reasons. First, there no common language used describe different Second, clear way understanding with respect organization's life cycle concerns -software quality such as maintainability portability, modularity, reusability, and so forth. We address shortcomings by...

While software architecture has become an increasingly important research topic in recent years, insufficient attention been paid to methods for evaluation of these architectures. Evaluating architectures is difficult two main reasons. First, there no common language used describe different Second, clear way understanding with respect organization's life cycle concerns -software quality such as maintainability portability, modularity, reusability, and so forth. We address shortcomings by...

The SOA approach is a very popular choice today for the implementation of distributed systems. use or more specifically Web services technology an important architecture decision. An architect should understand how different quality attributes system are impacted by that While there significant benefits with respect to interoperability and modifiability, other qualities such as performance, security testability concerns. This paper discusses can be positively negatively affected technology....

DevOps aims to reduce the time between committing a system change and placing into normal production, while ensuring high quality. The article topics in this theme issue include using migrate microservices, adopting DevOps, tools. Web extra at https://youtu.be/NzX6JmwDS0s is an audio recording of Davide Falessi speaking with Len Bass George Champlin-Scharff about IEEE Software May/June 2016 on its practices.

This paper presents experience with explicitly managing variability within a software architecture. Software architects normally plan for change and put mechanisms in the architecture to support those changes. Understanding situations where has been planned recording options possible particular is usually not done explicitly. becomes important if used many product versions over long period or line context build variety of different products. That is, it represent variation indicate locations...

The ability of an organization to successfully carry out its tasks depends on the appropriate combination organizational structure, processes, and communication coordination mechanisms. In this paper, we present four case studies that exemplify breakdown problems in global software development. Our analysis showed those took place even presence a collection mechanisms tools established increases teams perform their tasks. Finally, discuss possible solutions overcome identified problems.

DevOps practices deal with such things as the velocity of releases, how fast incidents are handled, and enforcement organizationally specified security practices. All these critical for success in today's environment, architect is adopting This instalment Pragmatic Architect explains why.

Applications in the cloud are subject to sporadic changes due operational activities such as upgrade, redeployment, and on-demand scaling. These operations also interferences from other simultaneous operations. Increasing dependability of these is non-trivial, particularly since traditional anomaly-detection-based diagnosis techniques less effective during operation periods. A wide range legitimate confound anomaly make baseline establishment for "normal" difficult. The increasing frequency...

Article Free Access Share on The design of a wearable computer Authors: Len Bass Carnegie Mellon University, Pittsburgh, Pa PaView Profile , Chris Kasabach Richard Martin Dan Siewiorek Asim Smailagic John Stivoric Authors Info & Claims CHI '97: Proceedings the ACM SIGCHI Conference Human factors in computing systemsMarch 1997 Pages 139–146https://doi.org/10.1145/258549.258634Online:27 March 1997Publication History 44citation1,332DownloadsMetricsTotal Citations44Total Downloads1,332Last 12...

Blockchains have been applied in different domains to guarantee data integrity and provide a decentralized computational infrastructure for executing smart contracts. Multiple blockchain-related patterns summarized by academics industry practitioners covering aspects, such as engineering applications on top of blockchain, structuring contracts, security. The existence these is both helpful challenging designers. Helpful, the means that developers do not need recreate solutions common...

Abstract : In this report, we present an approach to improving the usability of software systems by means architectural decisions. We identify specific connections between aspects usability, such as ability undo, and architecture. also formulate each aspect a scenario with characteristic stimulus response. For every scenario, provide architecture pattern that implements its usability. then organize scenarios category. One category presents benefits these users or their organizations. A...