Computer Studies·System analysis · NSSCO 1.1
The system life cycle, feasibility studies & fact-finding
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How does a school move from a paper attendance register to a computer system that does the job in seconds? Not by luck, but by following a careful, planned route called the system life cycle. In this lesson we walk every stage of that cycle as a loop, learn why old systems must be replaced, meet the feasibility study, and master the four fact-finding methods an analyst uses to study an existing system.
What you'll learn in this lesson
By the end you should be able to (NSSCO Computer Studies 1.1):
- Define a system life cycle
- Describe each stage of the system life cycle: analysis, design, development, testing, documentation, implementation and installation, evaluation, maintenance
- Explain why a system has a limited life span
- Explain the importance of defining a given problem accurately
- Describe the function of a feasibility study
- Explain the importance of determining the system requirements in order to solve a problem
- Describe the following methods of fact finding used to collect information about data flow (data input and output, data processing and storage) together with the associated hardware of the existing system: questionnaire, structured interviews, observation, study documents used in the existing system
- Identify the new system requirements
- Predict the needs for development and maintenance of the new system
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Miss Maria and Mike talk through the whole topic — with the figure and working drawn live.