We are now using computerised performance. On two occasions I have begun to enter the ZFW and then realised what I was doing. If the SOP is correctly followed, a mistake such as this will be picked up.
The computerised load sheets are worse than useless, always turning up just as you want to get going. Perhaps the actual TOM should be in bold or colour. The old "somethings not right" is also thrown out because the computer provides optimum performance and will vary the flap settings according to the conditions.
Take care!