Gentlemen - a question. When do you feel that you are committed to the landing? When PNF calls 'decide' (at least one aircraft has been landed at the wrong airfield because the crew felt they were committed to land, even though they realised their error before touchdown), nosewheel on ground, spoilers out, reversers selected, turning off the runway, or what? This critical decision cannot be made 'on the hoof', and I believe that the criteria ought to be discussed and thought out during initial and refresher training and briefed prior to the approach. Each landing will need a different answer depending on conditions and runway length. In general if your RLW tables say you will stop on the runway you will so long as you land at the correct position at the right speed, and have used the appropriate table for the actual runway conditions. Max braking may be required as soon as the wheels are down - remember: brake for effect not for comfort. In most instances a single failure should be contained within the 1.67 safety factor. What do you all think? Four overruns in such a short space of time is too many.