Another feature of the 787 is that the OPT onboard performance tool incorporates a return to land calculation within the take off calculation. A field is available to input icing conditions expected yes or no this is purely for the return to land calculation for the OEI missed approach, this due to the fact an allowance is made for stab icing during the return to land manoeuvre if yes is inserted. Thus you could be in a position where payload is limited at take off due to return to land performance. However as a driver always nice to know you have return to land performance.