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EXISTING SYSTEM

PROPOSED SYSTEM

EXISTING CONCEPT:-

QoS is widely employed for describing nonfunctional characteristics of web services.

Still a lack of comprehensive real-world web service QoS data sets for validating various QoS-based approaches

QoS has become an important differentiating point of different functionally equivalent web services.

PROPOSED CONCEPT:-

Web service composition enables seamless and dynamic integration of business applications on the web.

The performance of the composed application is determined by the performance of the involved web services.

The problem of identifying the best candidate web services from a set of functionally-equivalent services is a multi-criteria decision making problem.

EXISTING TECHNIQUE:-

Keyword-based search techniques

PROPOSED TECHNIQUE:-

Service evaluation technique

TECHNIQUE DEFINITION:-

This lack of textual information makes keyword-based searches vulnerable to returning irrelevant search results and therefore become very primitive means for effectively discovering Web services.

TECHNIQUE DEFINITION:-

Web service QoS prediction usually includes a user-item matrix, where each entry in the matrix represents the value of a certain QoS property (e.g., response time) of a web service observed by a service user

DRAWBACKS:-

Web service invocations consume resources of both service users and service providers.

It Is Difficult To Collect Web Service Qos Data From Distributed Service Users

ADVANTAGES:-

We address the problem of QoS-driven service composition, defining QoS-based dominance relationships between services to select the ones to be considered for composition.

We present a method for determining which QoS levels of a service is improved.