Originally Posted by
ATC Watcher
Excellent reminder safetypee . A similar sentence was also in Perrow's " normal accidents " book if I remember.
We have a saying in French (from Alphonse Allais) that can translate as when you voluntarily exceed the rules/borders , there are no limits anymore on what you can do .. ( une fois passe les bornes il n'y a plus de limites) Those 2 sentences resume well the SFO self separation procedure only aimed to allow more movements in an Airport which runways configuration, according to the rules, would not allow simultaneous approaches.
AKA “normalisation of deviance” used to describe the runup to a famous accident...