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The stages outlined by the SDLC model are:
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PROBLEM IDENTIFICATION. Systems are developed to achieve certainspecific
goals. The identification of a problem and its clear precise definition act as a strong basis
for the formulation of the goals of the system.
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FEASIBILITY STUDY. This is a preliminary study carried out to determine if
thesystem development warrants proceeding or not. A system is feasible if it helps the
organisation meet its overall objectives- economic, technical, social, organisational.
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SYSTEM INVESTIGATION. A new system almost inevitably replaces an
alreadyexisting one. The system investigation is a thorough examination of the
existing system as a means of clearly documenting it in totality. Various methods
used include interviews, questionnaires, observation and searching documents.
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SYSTEM ANALYSIS. This is a thorough examination of the documented systemto
determine its strengths and weaknesses, opportunities and threats as a means towards
providing inputs for the design stage.
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SYSTEM DESIGN. This is the development of the logical structure of the
newsystem that will solve the problem defined in the first stage. It occurs at various
levels and mirrors the system components namely input, output, processing and
files.
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SYSTEM IMPLEMENTATION. This is the actual realisation of the
systemdesign as a real, working system. Choices need to be made as to whether the
system will be constructed or purchased. Other relevant issues are the installation,
testing, training, file conversion and the actual changeover.
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REVIEW AND MAINTENANCE. Two types of reviews are carried out i.e. thepost
implementation review and the system evaluation. System maintenance comes in three
forms namely corrective, adaptive, perfective and preventive.
gregorymasila answered the question on December 18, 2017 at 13:32
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