The lifecycle of a system commences with a statement of
need and ends with the disposal of the system brought
into service to satisfy that need. In between, there is
a series of stages or activities, each of which builds
on the preceding stage or activity to form the systems
engineering process. These stages or activities are characterised by a
lifecycle model.
A lifecycle model therefore
provides a model for the lifecycle of a system, from
the statement of need through to disposal of the system.
A general model includes two broad phases: the Acquisition Phase
and the Utilisation Phase. It is useful to break the
Acquisition Phase down further into the major activities of Conceptual
Design, Preliminary Design, Detailed Design and Development, and Construction and/or
Production.
There are a number of life cycle models in
existence.
Other topics in our resources on Systems Engineering related to Lifecycle Model include: