The base package usage transaction business object is represented by D2-UsageTransaction.

Based on the information provided in the Oracle Utilities Customer Cloud Service documentation, the three configuration areas that impact the usage calculation process in the context of the D2-UsageTransaction business object are as follows:

VEE Rule (Validation, Estimation, and Editing Rule): The VEE rule is crucial in the usage calculation process as it involves the validation, estimation, and editing of meter data before it is used for billing and other purposes. This ensures the accuracy and reliability of the data used in the calculation.

TOU Map (Time of Use Mapping): Time of Use (TOU) mapping is significant in the usage calculation process, especially for customers on TOU rates. It involves mapping the consumption data to different time periods, which are often priced differently. This impacts the overall calculation of the usage cost.

Usage Calculation Rules: These rules define how usage is calculated based on various factors such as consumption data, rate schedules, and other relevant parameters. They are integral to determining the final usage charges.

These configuration areas are integral to the process of calculating usage, ensuring that the calculated data is accurate, corresponds to the appropriate time periods, and aligns with the specific billing rules and rates applicable to the customer.