I have uploaded the Administrator Guide for HP ALM 11.52 for your review.
I would suggest reviewing the following:
1. In the Admiinistrator Guide, please review Chapter 18, ''Customizing Risk-Based Quality Management'' and then
From Chapter 18 of the Administrator Guide:
You use risk-based quality management to determine at which Testing Level to test each requirement in the Requirements module. ALM then calculates the total estimated Testing Time for an analysis requirement based on the Testing Levels of its child assessment requirements. You compare this with the resources you have available to test the analysis requirement, and if necessary, make adjustments to the Testing Levels for the requirement and its children. This enables you to plan the testing strategy for your requirements.