(clause 6.4.11) Operation process (clause 6.4.12) Maintenance process (clause 6.4.13) Disposal process (clause 6.4.14) Each process is defined by a purpose, outcomes and activities. Activities are further divided into tasks. See also Systems development life cycle System lifecycle Capability Maturity Model Integration (CMMI) ISO/IEC 12207 Concept of operations or CONOPS References Systems engineering 15288 15288