Composition
Composition is a stricter form of aggregation, in which the parts are existence-dependent on the…
Basics
Basics
Class and Interaction Diagrams
Class diagrams A class diagram describes the static structure of a system. It shows how…
Basics
Utility of use case diagrams
From use case diagram, it is obvious that the utility of the use cases are…
Basics
Use Case Model
The use case model for any system consists of a set of “use cases”. Intuitively,…
Basics
Basic Ideas on UML
Model A model captures aspect important for some application while omitting (or abstracting) the rest.…
Basics
Structured Design
The aim of structured design is to transform the results of the structured analysis (i.e.…
Basics
DFD Model of a System
Context diagram The context diagram is the most abstract data flow representation of a system.…
Basics
Data Flow Diagrams (DFDs)
Structured Analysis Structured analysis is used to carry out the top-down decomposition of a set…
Basics
Functional independence
A module having high cohesion and low coupling is said to be functionally independent of…
Basics
An Overview of Current Design Approaches
Cohesion Most researchers and engineers agree that a good software design implies clean decomposition of…