I don't think it really matters precisely what your prefix is so long as you're logical and consistent. Personally I use
spu_[action description][process description]
where action description is one of a small range of typical actions such as get, set, archive, insert, delete etc. The process description is something short but descriptive, for example
spu_archiveCollectionData
or
spu_setAwardStatus
I name my functions similarly, but prefix with udf_
I have seen people attempt to use pseudo-Hungarian notation for procedure naming, which in my opinion hides more than it reveals. So long as when I list my procedures alphabetically I can see them grouped by functionality then for me that seems to be the sweet spot between order and unnecessary rigour
