Operating cash flow vs. Operating cash flow before Interest and Tax

CFA Level II FRA
#1

For reference, I have a question about Reading through LOS 21c “Evaluate the quality of a company’s financial data, and recommend appropriate adjustments to improve quality and comparability with similar companies, including adjustments for differences in accounting standards, methods, and assumptions.” from the 2015 Schweser books:

How come Operating cash flow to operating income , Cash flow to total debt , and Cash flow interest coverage uses OCF before interest and tax in the ratio while Operating cash flow to total assets and Cash flow to reinvestment uses OCF without removing interest and tax?

The difference is not explained in the book and I am having a hard time remembering when to remove interest and tax effects and when to keep them. Is there an easy way to remember?

#2

How to get operating cf before interest and tax Is it EBIT + Depreciation

#3

How to get operating cf before interest and tax Is it EBIT + Depreciation

#4

EBITDA is one of the proxies for cash flow.

According to CFAI, it is a poor proxy compared to FCFF because is not adjusted for tax shield effect nor investements in fixed assets and operating capital.

#5

The example problems provide EBIT, Cash taxes paid and Cash interest paid. Sometimes they are removed and sometimes they are not.