In this study a research model is designed that describes the effects of IS company standards on business performance. This model is based on a pilot case study and on the small amount of literature available on company standards. Subsequently, the descriptive model is used in an in-depth case study at a large financial services corporation. This study is part of a series of case studies that will be used to validate the model. The case study describes the implementation, usage and effects of a HR IS standard. The goal is to provide a HR information infrastructure to support HR processes on a global, Business Unit and local level. The effects of these standards on HR business process performance are identified. To conclude, implications for future research are presented.