Composite web service is a combination of multiple abstract web services. To build a composite web service, the authors have to combine multiple abstract web services together may be in sequence or in parallel. On the fly to select the best web service from the multiple abstract web services available for the same purpose is the challenging job and leads to the NP complete problem. So, they are proposing an analyzing model of the abstract web services using software agents. Due to seamless integration of web services and mobile agents, agent based framework is a natural choice.