Re: Space Shuttle
No, that happens when the typical US managerial approach "don't fix anything that isn't broken, don't improve anything that works" is applied. They will keep the designated path right until they hit a wall.
Or a patch of water. F-35's again. One crashed, fortunately the pilot ejected safely. But this jumped out from the BBC's report-
In a statement, the F-35 Joint Program Office said the US and its international partners had suspended flight operations while a fleet-wide inspection of fuel tubes was conducted.
"If suspect fuel tubes are installed, the part will be removed and replaced. If known good fuel tubes are already installed, then those aircraft will be returned to flight status.
So it may be safety related, ie getting positive confirmation of parts installed by an engineer. But I thought one of the USPs of the F-35 and reasons for cost overruns was it's fancy software that's meant to track every component and report on problems. So theoretically run off a report that lists aircraft with the suspect part and the rest carry on flying. Unless there's.. issues. In which case, reconciling what's installed vs what's listed as installed is a big job.
But such is the cost of complexity and new things.. Which is going to be an issue for any Soyuz replacement.