The document presents a goal-oriented approach called the Decision Relationship Model (DRM) for business process improvement using data from a process warehouse. The DRM allows business experts to define goals, identify relevant data to evaluate decisions, and elicit and realize decisions through a semi-automated four step method. An example application to a healthcare case study demonstrates how the DRM was used to optimize doctor utilization by rescheduling duties based on workload analysis. Future work aims to scale the DRM to support complex, high-level goals and decisions.