Percentage spent Method of revenue plan- whether forecast can be used

Summary:

I understand that percentage spent method works my comparing the actual cost against the budgeted cost to derive the POC. Is it possible to use the latest forecasted cost instead of the budgeted base line costs for the same

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I understand that percentage spent method works my comparing the actual cost against the budgeted cost to derive the POC. Is it possible to use the latest forecasted cost instead of the budgeted base line costs for the same

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