accruals and net operating assets

How is accruals linked to the change in net operating assets? Can someone help explain thanks!

Cash-flow based accrual ratio = (NI - CFO - CFI)/Average NOA

Balance sheet based accrual ratio = (NOAt - NOAt-1)/Average NOA

Where NOA = Assets - Cash & cash equivalents + Liabilities - Total debt

Net operating assets (NOA) is the difference between operating assets and operating liabilities

NOA : (total assets – cash) – (total liabilities – total debt)