The description of the requirement that needs to be met. Specifications fulfil two basic purposes: to communicate what is needed to the supplier, and to allow measurement as to whether the goods or services delivered meet the required standard. There are two broad types of specification: input and output. Input specifications describe the technical standards which need to be met, and are sometimes called detailed specifications. Output specifications, such as performance or functional specifications, describe the function that needs to be performed and the outcomes that need to be met by the solution. See also Specification, Functional, Specification, Performance and Specification, Technical.

Drafting Specification and Offers training is available at Academy of Procurement.