Systems development on a large scale was first attempted by the US military in its Department of Defense (DOD) and by the National Aeronautics and Space Administration (NASA). They were therefore instrumental in developing the framework of a sequence of stages or phases for developing a system.
This sequence of distinct stages that a system goes through in its entire life is called the system development life cycle (Anderson 1991). The idea in such frameworks is to understand the detailed issues pertaining to the system in concept development, requirement definition, design, implementation, test and integration, installation, acceptance and operations.
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