What is required to calculate utilization for a parent utilization calculation record?

To calculate utilization for a parent utilization calculation record, the requirement is to have one or more child utilization detail records. This is because the parent record aggregates the data from its child records to determine overall utilization metrics. Each child detail record contains specific data points, such as hours worked vs. billable hours, which contribute to the parent record's overall calculations.

This structure allows for a detailed understanding of how individual components (the child records) contribute to the larger picture (the parent record). It ensures that the calculation reflects all relevant activity and can produce accurate and meaningful results, essential for effective resource planning and management in professional services automation.

The other choices do not provide the necessary framework for the utilization calculation: relying solely on historical data would lack the current context; having multiple parent records would not contribute to a single utilization metric; and additional resources or tools are not specified as a requirement for this calculation process. Thus, having child detail records is essential for the accurate calculation of the parent utilization.