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.
|Availability||How often is the service available for consumption?|
|Accessibility||How capable is the Web service of serving a client'' request now?|
|Performance||How long does it take for the service to respond?|
|Compliance||How fully does the service comply with stated standards?|
|Security||How safe and secure is it to interact with this service?|
|Energy Efficiency||How energy-efficient is this service for mobile applications?|
|Reliability||How often does this service ...|