Program and System Design 2023-2024

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What is the primary reason for the continued importance of program design techniques in project teams' reliance on packaged software or preprogrammed code?

To understand, organize, and piece together preexisting code

What is the purpose of logical Data Flow Diagrams (DFDs) during system analysis?

To describe processes and data flows needed for the new system's functional requirements

What distinguishes a physical Data Flow Diagram (DFD) from a logical DFD?

It contains additional details describing how the system will be built

What is not contained in logical Data Flow Diagrams (DFDs) for a to-be system?

Indication of how the system will actually be implemented when built

What do physical process models created during design aim to show?

Implementation details and how the final system will work

Study Notes

Program Design Techniques

  • The primary reason for the continued importance of program design techniques is that even with packaged software or preprogrammed code, project teams still need to design how these components fit together and interact.

Data Flow Diagrams (DFDs)

  • The purpose of logical Data Flow Diagrams (DFDs) during system analysis is to model the flow of data through a system, focusing on what the system does, without considering how it will be implemented.

Logical vs. Physical DFDs

  • A physical Data Flow Diagram (DFD) differs from a logical DFD in that it shows how the system will be implemented, including the physical components and architecture.

Logical DFDs

  • Logical Data Flow Diagrams (DFDs) for a to-be system do not contain implementation details, such as hardware or software specifications.

Physical Process Models

  • Physical process models created during design aim to show how the system will operate, including the physical components, and how they will interact.

Test your knowledge about program design techniques and the importance of system design in project teams. Explore the role of packaged software, libraries, and original code in building systems.

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