Prefinancing / Discretionary / Free Cash Flow

Can someone tell me where these def’ns are in the books? does anyone have an easy way to remember these calcs?

They are in the credit analysis section in FI. These are used to calculate various ratios when accessing capacity to pay. e.g. debt payback period, debt service coverage.

Credit Analysis in Fixed Income in Schweser. There’s a small tip at the end of the page as well which will help you remember the calcs.