Learn in the textbookPromoting and Evaluating System Utilization
DefinitionThe system lifecycle (システムライフサイクル) is the entire flow of a system from planning through development and operation until its disposal.
ExplanationThe stages can be divided, for example, into planning, requirements definition, development, operation and maintenance, and disposal. Operation and maintenance continue long after development ends, so costs and benefits are estimated across the whole life of the system.
AnalogyA house is not finished once it is built: you repair it while living in it, and eventually it is rebuilt or torn down. This idea plans that whole life together.
Memory hookA life cycle originally describes the stages of a living thing. Picture a ring that runs from birth to death.