A specification is a description of a product or service a user seeks to procure, and is also, a description of what a bidder must offer to be considered for an award.
Specifications are the primary means of communication between an agency and a vendor.
Avoid unnecessary detail, but be complete enough to ensure that requirements will satisfy their intended purpose. Use terminology that is understandable to the agency and bidders. Use correct spelling and appropriate sentence structure to eliminate confusion. Avoid legalese type language and jargon whenever possible. Use units of measure that are compatible with industry standards.