functional specification

(computer science) The documentation for the design of an information system, including the data base; the human and machine procedures; and the inputs, outputs, and processes for each data entry, query, update, and report program in the system.

The blueprint for the design of a system. With regard to a business information system, the specification provides the documentation for the database structure, the human and machine procedures, and all the input, processing and output detail for each data entry, query, update and report program. See information requirements.

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