often Ensure that the word is not in a spurious phrase not specifying a requirement. If the word is used in specifying a requirement, ensure that an objective criterion is present for what constitutes “often”. operate “Operate” means “do something”. It does not mean “do everything”, nor “do something with specified performance”. Nor does “operate” cover non-functional requirements. If the intention is to cover only functional and performance requirements, ensure that the term is used within “shall operate as specified herein”.
Replaced/Superseded by document(s)
An effective technique for finding defects in specified requirements is the use of keyword searching, against parts of words, words and phrases, each of which may indicate a defect in a requirement. Although written as a list for verifying requirements, the list provided also contains much advice.
the original writer of requirements, and requirements specifications, in English.