Revenue and expense-related financial transactions in Workday are normally tracked through financial organization structures such as cost centers. When a business needs to group members of multiple organizations for reporting on revenue and expense activity, a Cost Center Hierarchy is the correct organization type. Cost centers identify where costs, expenses, and financial accountability are assigned. A hierarchy allows multiple cost centers to be rolled up for consolidated reporting, financial analysis, budgeting, and management review. A Region Hierarchy can group geographic regions, but geography is not the primary driver for revenue and expense reporting in this scenario. A Supervisory Organization Hierarchy is used for worker reporting relationships and staffing, not financial transaction grouping. A Location Hierarchy groups physical locations and may support workforce or facilities reporting, but it is not the appropriate structure for tracking financial transactions by revenue and expense. Therefore, the correct organization type is Cost Center Hierarchy. Reference topics: Organizations, Cost Centers, Cost Center Hierarchies, Organization Assignments, and financial transaction reporting.