WJEC GCSE Digital Technology - Topic 2 SA

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What methods does a Systems Analyst use to investigate the existing system?

Methods used by a Systems Analyst to investigate the existing system include questionnaires, feasibility reports, interviews, and observing staff.

What does the feasibility report include?

The feasibility report includes identifying the scope of the current system, existing hardware and software, problems with the system, and understanding the requirements and ability to cope with new system demands.

What tools are used during analysis to map out information flow?

Tools used during analysis to map out information flow include Data Flow Diagrams, Decision Tables, and Data Dictionaries.

What does the design stage include?

The design stage includes hardware, software, network, staff issues, and security procedures.

What does implementation involve?

Implementation involves selecting a changeover method, installing hardware and software.

What does maintenance involve?

Maintenance involves user guides, technical manuals, and error checking.

What does evaluation determine?

Evaluation determines how well the system meets initial requirements, identifies necessary changes, and plans for system evolution.

What is bespoke software?

Bespoke software is customized to a specific company's needs, but development is time-consuming and expensive.

Study Notes

Overview of Systems Analysis, Design, and Implementation

  • A Systems Analyst investigates the existing system using methods such as questionnaires, feasibility reports, interviews, and observing staff.
  • The feasibility report includes identifying the scope of the current system, existing hardware and software, problems with the system, and understanding the requirements and ability to cope with new system demands.
  • During analysis, Data Flow Diagrams, Decision Tables, and Data Dictionaries are used to map out information flow, simplify decision rules, and explain database fields.
  • The design stage includes hardware, software, network, staff issues, and security procedures.
  • Implementation involves selecting a changeover method, installing hardware and software.
  • Maintenance is ongoing and involves user guides, technical manuals, and error checking.
  • Evaluation determines how well the system meets initial requirements, identifies necessary changes, and plans for system evolution.
  • Different types of software include program software, business process management, customer relationship management, and productivity software.
  • Bespoke software is customized to a specific company's needs, but development is time-consuming and expensive.
  • Anti-virus software monitors computer systems for virus infections using unique signatures and quarantines infected files.
  • Backup methods include full, incremental, differential, and grandfather-father-son backup, each with advantages and disadvantages.
  • Disaster recovery plans include a recovery site, a data restoration procedure, recovery time and point objectives, regular testing and verification, and employee training.

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