More usefully we need something like "engineers sign off". A railway engineer is needed to sign (literally) a document saying that a new bridge or changed line

More usefully we need something like "engineers sign off". A railway engineer is needed to sign (literally) a document saying that a new bridge or changed line is safe and reliable - and if they don't there is no getting around it by management etc. This has lots of implications but the big one is really very few railway deaths.