Wouldn't that be your company specific?
Specification the term means to specify something. In terms of a "task" it depends on what the "task" is. Could be importing data, in which case at minimum you need the structure - i.e. variables, types, lengths, code lists -, when the files will be sent, what file format, e.g. csv, how they will be sent, e.g. secure portal, contacts etc.
Therefore your question is way too vague to answer.