N1 assuming you are in EASA land your company is required to carry, paper or electronic (depending on the class of EFB), versions of the perf data in table form. I would suggest you start with that. Enter with actual temp and wind component, read across, then correct for pressure, bleed, TAI, MEL/DDG. Reverse correct to find assumed TOW for R-TO assumed temp et al.
Or if your handling agents produce provisional load sheets, use that to get an idea after whacking in the numbers to get a result. Should sound any early alarm bells. If in doubt, email training, or read your part C or EFB manual. Perhaps both
Last edited by BUGS/BEARINGS/BOXES; 28th May 2012 at 22:31.