Final answer:
The PDt is an online tool used by federal agencies to determine the risk level of federal civilian positions for background investigation requirements.
Step-by-step explanation:
The Position Designation Automated Tool (PDt) is an online application used by federal agencies to help determine the risk level for federal civilian positions. It assists in the application of appropriate background investigation requirements by evaluating the position's potential for adverse impact on the national security or the efficiency of the service. This is part of the broader personnel security program which includes the assignment of a position risk designation to each federal job. PDt streamlines the process of identifying these designations which range from low, moderate to high risk.