From the Cambridge dictionary
Miriam Webster
Collins
You should be asking the question - why were they negligent? Instead of blaming poor SOPs. Poor SOPS didn't cause them to ignore the IAS. This has the hallmarks of a cultural problem which I sincerely hope has been addressed.
Nuff said
“Nuff said” demonstrates a completely closed mind and inability to think about the issue from a wider angle.
The word “negligent” is a subjective, opinionated and emotive word which does little to contribute to a considered and intelligent analysis of the causes of this event.