Information item that presents a systematic course of action for achieving a declared purpose, including when, how, and by whom specific activities are to be performed. (ISO/IEC/IEEE 2011)
ISO/IEC/IEEE. 2011. "Section 5.16," in Systems and software engineering - Content of the life-cycle information products (documentation). Geneva, Switzerland: International Organisation for Standardisation (ISO) / International Electrotechnical Commissions (IEC) / Institute of Electrical and Electronics Engineers (IEEE). ISO/IEC/IEEE 15289:2011.