Line check speed
Seems like we may be back to discussing the possibility of implementing a line check speed, as when Emirates took a tour of the departure end in Oz a while back. Every military fighter I ever flew had a line check speed. The number was calculated for each flight before anybody ever headed toward his aircraft. Infallible system. Sir Isaac Newton: Force=Mass times Acceleration. After brake release, you looked at your ASI as you passed the 1000-foot mark (2000 feet for some aircraft) on takeoff roll. If you didn't achieve that number, you aborted. Figured out what was wrong. Lived to fly another day. Didn't run off the end of the runway dragging a bunch of navaid equipment with you. If you were off by 3-4 knots, that was ok. Off by 5 or more knots, abort. If the Force (thrust) was inadequate or the Mass was too great, not enough Acceleration was produced, making you "check speed" too slow. Simple, effective. No laptop or dispatch needed.