Working Capital Calculation

Dear Tutor,

I was looking through the calculation of working capital in APV and FCF valuation questions.

Example of APV: Dec 2018, Q3:
“Working capital of $6m, not included in the estimates above and funded from R/E, will also be required immediately for the project, rising by the predicted inflation rate for each year. Any remaining W/C will released in full at the end of the project.”

The working capital for year 1 is: 6m*(1+0.08) = 6.48m, thus, the W/C expense is 0.48m for year 1.

Example of FCF valuation: BBP revision kit, Q61:
“The company will require an additional investment in assets of 30c per $1 increase in sales revenue for the next four years.”

The working capital for year 2 is calculated via: (Y2 rev – Y1 rev)*0.3.

My question is, what keyword(s) should I look out for to determine the W/C charge per year? From the example of APV, the working capital of Y1 is the incremental increase from the W/C charge in Y0, therefore only the additional requirement is recorded within the appraisal. Whereas from the FCF valuation example, the W/C is recorded as the full amount.

Thanks in advance.
IL