Software Design Principles and Structured Analysis
This module focuses on the fundamental principles of software design, emphasizing cohesion and coupling as essential attributes for quality and maintainability. It explores Structured Analysis and Structured Design (SASD) methodologies, highlighting the importance of Data Flow Diagrams (DFDs) for modeling system processes and data flows. The chapter provides comprehensive frameworks for assessing module strength and interdependence, guiding effective software architecture creation.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Cohesion is essential for maintainability, understandability, and reusability in software design.
- Coupling reflects the interdependencies between modules; high cohesion and low coupling are ideal for robust design.
- Structured Analysis and Structured Design methodologies promote systematic approaches to software development.
Key Concepts
- -- Cohesion
- A qualitative measure of how closely related and focused the responsibilities of a module are.
- -- Coupling
- A measure of the degree of interdependence between software modules, influencing maintainability and reusability.
- -- Data Flow Diagram (DFD)
- A graphical representation indicating how data flows through a system, depicting inputs, processes, storage, and outputs.
- -- Structured Analysis
- A methodology for defining the functional requirements of a system in a graphical model.
- -- Structured Design
- A methodology for creating a modular architecture from the logical model specified in Structured Analysis.
Additional Learning Materials
Supplementary resources to enhance your learning experience.