It is useful as long as they do not know what happened. NASA once had the problem that the initially suspected problem turned out to be wrong but the news was a

It is useful as long as they do not know what happened. NASA once had the problem that the initially suspected problem turned out to be wrong but the news was already out there and it took years to spread the correct one. That's why it these problems are now referred to as anomaly until the real cause is clear.