Hello Sonicbum, I appreciate for your time and interesting reference. By the challenge of EASA, if I correctly understood only the plan in future to combine type and depth of contaminant with RWYCC downgrade.Moreover Flight Smart + Take Off consider only type and depth of contaminant, which also recommended for Take Off calculation to satisfy with accelerating while Rolling. Just one method in above mentioned which I can suggest to find the more conservative performance from reported contamination and downgraded RWYCC. But if we have crosswind or weight limitation its a bit difficult to proof the right way of our calculation, together for all thirds of the actual RWY. Please correct me if its true.