Streamline,
Why would you factor performance in flight ref data. That is only for despatch to meet the criteria of perf a probability formula.
Ref distances from NNC/qrh etc are based on actual distances and not factored, or you would never achieve a landing distance in a non normal situation.The PI distances are conditional only on entering the tables in the right config/conditions/problem. Follow the sequence in these charts and you will have a actual distance for the condition and techniques so followed.