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Developing Enterprise Web Services: An Architect's Guide by James Webber - Ph.D., Sandeep Chatterjee - Ph.D.

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QoS Metrics for Web Services

QoS metrics are a set of qualitative measures of how appealing a Web service is for applications that may potentially consume it. QoS answers a set of “How?” questions, as listed in Table 9-1.

Table 9-1. A listing of the QoS measures that are important for enterprise Web services.
AvailabilityHow often is the service available for consumption?
AccessibilityHow capable is the Web service of serving a client'' request now?
PerformanceHow long does it take for the service to respond?
ComplianceHow fully does the service comply with stated standards?
SecurityHow safe and secure is it to interact with this service?
Energy EfficiencyHow energy-efficient is this service for mobile applications?
ReliabilityHow often does this service ...

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