The service-oriented paradigm continues to gain traction in grid computing. Open-grid services architecture (OGSA) has defined a service-oriented grid-computing environment based on existing Web service standards and technologies. As more and more grid resources are made available as grid services in practice, it has become commonly understood that a solution that can combine and coordinate existing services into useful appli cation logic is needed. Considered to be a key element toward a fully integrated service-oriented architecture, business process execution language (BPEL) is the de facto standard for Web service orchestration in industry, providing the models and language specification for defining executable application workflows based on service invocations. It is in our interest to explore the applicability of using BPEL in grid applications.