Replaceability based Web Service Selection Approach

Web services are important components of modern day software. Many services are composed on the fly to offer the required business functionality. Web services run in very dynamic environment and are prone to failure or run time change in service quality. On the occurrence of failure or unavailability of any component service, replacement by an equivalent service is required. In this paper, a web service selection approach by taking into cognizance the replaceability of service as the basis of selection is used. At the time of selection, the replaceability of a web service is determined using improved PROMETHEE method. The task of obtaining replacement service at run time is very expensive and challenging. The experimental results depict the improvements achieved in the results of selection. The experiments are conducted by taking QoS dataset of real world web services.