Many cross-domain and cross-region services and applications have flooded the Internet, such as API services, IoT services, etc. These services are interconnected and form a new service ecosystem, the Internet of Services (IoS). Through IoS, service providers have a broader platform to deliver their services to users. Users can ask for a composite service solution without finding multiple suitable services themselves. However, IoS requires a standard modeling language and methodology to provide developers with a unified understanding of IoS. This modeling methodology should guide developers through the IoS modeling task. Therefore, we propose an Open System Architecture for the Internet of Services (IoS-OSA). We divide IoS into a three-dimensional cube according to layers, views, and lifecycle dimensions, with 64 different views. It integrates the existing scattered work of IoS into a unified framework and introduces the content description and the recommended modeling specification of each view. Finally, we propose the corresponding modeling methods for several key views in IoS-OSA such as service ecosystem, value/quality/capability (VQC) of IoS, etc., which improve the overall architecture of IoS.

For the service value chain composed of service provider, service contractor and cloud service platform, an evolutionary game model is developed to improve its service quality considering the supervision of service platform. Firstly, the profit function is built in different strategies of all the game players, and then the profit matrix is also established. In order to create every individual’s evolutionary process, their replication dynamic equations are presented as well. Secondly, this work analyzes both the influence of related parameters on the decision of the game entities such as the strategic investment of entities and the gradual stability of the evolutionary game model. Moreover, the evolutionary stability strategy (ESS) of the different game players is obtained subsequently under the influence of different factors. The research results show that cloud service platform supervision can promote the high-quality service of service provider and service contractor. It can also push service provider to provide higher quality service through properly reducing the minimum service investment and its basic cost. At the same time, service contractor can provide high level service while increasing its service commitment.

Abstract In service‐oriented architecture, services and business processes are closely related and therefore the research on service‐oriented business process (SOBP) attracts the attention of academia as well as industry. Because of the loosely coupled, autonomic and dynamic nature of services, the operation and the performance evaluation of business process meet some challenges, such as the definition of the key performance indicators (KPIs) and the alignment of business performance and IT performance. In this paper, we address these challenges. First, the definition and the characteristics of an SOBP are presented with a motivating scenario. Then a service‐oriented business performance evaluation model is described, which integrates the performance of strategy layer, business process layer, business activity layer, service composition layer and IT infrastructure layer. The KPIs corresponding to each layer are also defined with their formal representations. The qualitative and quantitative performance analysis methods, based on the proposed model, are presented, respectively. Finally, the improved analytic hierarchy process is explicated to calculate the correlation between different KPIs and select the most suitable service. An online‐shopping example is taken to prove the soundness and the feasibility of the method. Copyright © 2008 John Wiley & Sons, Ltd.