As per our clients requirement there unit of measure will be Reels. But these reels are not equal in weight. For an example one reel will weight 49.5kgs, another will be 50.5kg. But still they are in one reel. So is OpernERP is capable in handling these difference. Can we define a tolerance level for each measure of unit?? for an example standared reel weight is 50.0 kg with a tolerence of +/- 2% ???