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A trust-based approach to selection of business services

机译：基于信任的业务服务选择方法

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With the increasing popularity of the service-oriented thinking in the business area, an overwhelming number of business services have arisen. These business services collaborate with each other and form a business network or a service-oriented business ecosystem (SOBE). It is a key issue to select appropriate business services to share and integrate them in the SOBE. Trust degrees play an important role in the selection of business services. However, existing researches mainly focus on quality of service (QoS)-based selection methods and few of them take trust degrees into account. In order to select services more accurately, a trust-based approach for selection of business services is proposed based on the formal definition of the SOBE. First, the method for acquisition and calculation of trust values is developed. The method also considers other parameters including QoS attributes, the physical distance between users and business services and the waiting time. Second, one node in a business flow may need to select two or more business services to achieve the user's requirements. Thus, the multi-service selection method for one node is presented. Third, a fuzzy chance-constrained programming model is proposed for the selection of business services by considering four kinds of factors: QoS attributes, trust relationship, physical distance and waiting time. Using the characteristic of fuzzy constraints, a function is developed to convert the fuzzy chance constraints into its crisp equivalents and then the equivalent crisp model is solved by the generic algorithm (GA)-based algorithm. For the case in which no satisfying solution can be found by the GA-based algorithm, a negotiation method is proposed to reach at a satisfying solution. Finally, a case study is conducted to demonstrate the feasibility and effectiveness of the proposed approach.
机译：随着面向服务的思想在商业领域中的日益普及，已经出现了数量众多的商业服务。这些业务服务相互协作，形成业务网络或面向服务的业务生态系统（SOBE）。选择合适的业务服务以在SOBE中共享和集成它们是关键问题。信任度在选择业务服务中起着重要作用。但是，现有的研究主要集中在基于服务质量（QoS）的选择方法上，很少有人考虑信任度。为了更准确地选择服务，基于SOBE的正式定义，提出了一种基于信任的业务服务选择方法。首先，开发了获取和计算信任值的方法。该方法还考虑了其​​他参数，包括QoS属性，用户与业务服务之间的物理距离以及等待时间。其次，业务流程中的一个节点可能需要选择两个或多个业务服务才能满足用户的需求。因此，提出了一种针对一个节点的多服务选择方法。第三，提出了一种基于机会限制的模糊规划模型，该模型考虑了QoS属性，信任关系，物理距离和等待时间这四种因素，选择了商务服务。利用模糊约束的特征，开发了将模糊机会约束转换为其清晰等价物的函数，然后通过基于通用算法（GA）的算法求解了等效清晰模型。对于基于遗传算法无法找到满意解的情况，提出了一种协商方法来达到满意解。最后，进行了案例研究，证明了该方法的可行性和有效性。

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