Non-Functional Requirements in the Context of SOA

Requirements Management Articles

This article presents new concepts to formalize and apply non-functional requirements (NFR) for business processes in the context of Service-Oriented Architectures (SOA). Today, popular languages for modeling business processes do not support the specification of NFRs in a systematic manner. However, there is a strong demand to explicitly address such requirements when designing and deploying software systems.

This articles presents an extension for BPMN (Business Process Model and Notation) towards the modeling of NFRs. A key feature is the tool independent representation of NFRs, which will be achieved by applying the widely used WS-Policy standard. Our approach also covers the mapping of the specified NFRs to the technical level represented by BPEL (Business Process Execution Language). For the monitoring of NFRs we exploit techniques from Complex Event Processing (CEP). A key characteristic of our solution is its coherence: from NFRs modeling at design level to their technical enforcement and dynamic validation during execution. The feasibility of our approach has been demonstrated by a proof of concept implementation based on NetBeans, Glassfish ESB, IEP as CEP implementation, and the BPEL Service Engine.

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Articles Knowledge

Reviewing Requirements for Testability

Modern software development approaches like Agile and Scrum support a strong collaboration between all member of the software development team, software testers and business analysts included. Even if you don’t use a method like Behavior-Driven Development (BDD) or Specification by Example, checking the fact that you will be able to actually test your requirements is […]

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Requirements Management Articles
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Understanding System Analysis Models

This article is an extract of the “Complete Systems Analysis” written by James and Suzanne Robertson. It explains the basics of analysis models and emphasize that the important thing to remember is that modeling tools are complementary. Each shows one aspect of the system. Together, they make a complete working model of the system.

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Requirements Management Blogs
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Find Missing Requirements

This blog post by Betsy Stockdale explains how to use the Feature Tree model to discover missing requirements.

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