What is the first step in the Data Unit Calculation Sequence (DUCS)?

The first step in the Data Unit Calculation Sequence (DUCS) is to clear previously calculated data. This step is crucial as it ensures that any prior calculations do not interfere with the new calculations being performed. By clearing out old data, the system can start with a clean slate, which helps maintain data integrity and ensures that the results reflect only the current inputs and calculations.

This step is foundational as it sets the stage for subsequent calculations that follow. Without clearing old data, there is a risk of inaccuracies due to remnants of previous calculations that might be inadvertently included in the new dataset. The focus is on creating an accurate and reliable environment for the calculations that will occur in the following steps.