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1.2 Analysis (What aspects need to be investigated? (Problems: Unless the…
1.2 Analysis
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Fact Finding
Interviews
Users are asked on a one-to-one basis or in groups. The interview may be structured or unstructured and it allows for follow up questions to be asked.
Questionniares
Involves a representative group of users who complete a set of questions: The questions may be open or closed and are aimed at collecting detail of the current data and processes.
Observations
Users are shadowed by systems analyst as they perform a particular task or their everyday task. To identify what the role entails, the data required and the processes involved .
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Purpose of Analysis
Current System: Research how the current system works using fact finding.
Identify input, output and processes.
Describe the old system with DFD's.
Document findings.
Agree the DFD's with the end user.
New system: Define requirements for the new system (Functional and non- functional).
Specify hardware and software.
Identify constraints.
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System Analysis: A series of steps in the process of investigating a problem, understanding user requirements with the aim of identifying how a new system will solve the problem.