This paper describes our work in creating a case study on optimistic computing for the Grid using parallel mesh generation. For the implementation of parallel mesh generation methods we use a Portable Runtime Environment for Mobile Applications which is extended to provide support for optimistic control using grid performance monitoring and prediction. We will use this case study to develop a methodology for estimating target operating regions for grid applications. The goal of this project is to generalize the experience and knowledge of optimistic grid computing gained through mesh generation into a tool that can be applied to tightly coupled computations in other application domains. @InProceedings{ngs-mesh-ipdps03, author = {Nikos Chrisochoides and Andriy Fedorov and Bruce B. Lowekamp and Marcia Zangrilli and Craig Lee}, title = {A Case Study of Optimistic Computing on the Grid: Parallel Mesh Generation}, booktitle = {Next Generation Systems Program Workshop, IPDPS'03}, year = 2003 }