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ACSC 155 System Analysis and Design 4. Systems Design

ACSC 155 System Analysis and Design 4. Systems Design. Systems Design. The evaluation of alternative solutions and the specification of a detailed computer based solution. Also called physical design. Driven by system designers and/or system analysts. Design.

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ACSC 155 System Analysis and Design 4. Systems Design

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  1. ACSC 155 System Analysis and Design4. Systems Design Dr. Stephania Loizidou Himona

  2. Systems Design • The evaluation of alternative solutions and the specification of a detailed computer based solution. • Also called physical design. • Driven by system designers and/or system analysts. Dr. Stephania Loizidou Himona

  3. Design • System Analysis (requirements) • System Design deals with the physical or implementation dependent aspects of a system (the system’s technical specifications) HOW TO Dr. Stephania Loizidou Himona

  4. Systems design builds on the knowledge derived from systems planning and systems analysis. • System Analyst - Primarily focused on the logical, implementation independent aspects of the system (requirements). • System design - Deals with the physical or implementation dependent aspects of a system (system’s technical specifications). Dr. Stephania Loizidou Himona

  5. Design process 3 phases of System Design a. Selection Phase - Evaluation and selection of alternative solutions b. Acquisition Phase - Acquisition or purchase of computer software and hardware c. Design & Integration Phase - Traditional physical design and integration of computer- based components Dr. Stephania Loizidou Himona

  6. a. Selection Phase • Steps: Specify alternative solutions Analyse feasibility of alternative solutions Recommend a solution Dr. Stephania Loizidou Himona

  7. b. Acquisition phase and system design • Steps Research Technical criteria and options Solicit Proposals (or Quotes) from Vendors Validate Vendor claims and performance Evaluate and Rank Vendor Award (or Let) Contract and Debrief Losing Vendors Establish Integration Requirements Dr. Stephania Loizidou Himona

  8. c. Establish Integration Requirements • Steps Analyse and Distribute data Analyse and Distribute process Factor into design units Design computer files and/or Database Design Computer Outputs and Inputs Design On-line user interface Present and Review Design Dr. Stephania Loizidou Himona

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