Alt Investment: Carried Interest

For the exam, there are two ways for a fund to pay carried interest as shown below,

  1. Carried interest is paid when value of total portfolio (NAV before distributions) > committed capital

  2. When the value of investment is over a certain IRR?

I am confused on the second way of calculating carried interest. This method is used when the investments within the portfolio are to be evaluated independently?

Regarding the second method it is not the value that will exceed a certain IRR it is when when the investments ( in all projects included) exceeds a specific IRR like a hurdle rate