Basics 6 min read
Design Patterns
Identify the basic difference between object-oriented analysis (OOA) and object-oriented design (OOD). The term object-oriented analysis (OOA) refers to…
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Basics 5 min read
Activity and State Chart Diagram
Activity diagrams The activity diagram is possibly one modeling element which was not present in any of the predecessors of…
Basics 7 min read
Composition
Composition is a stricter form of aggregation, in which the parts are existence-dependent on the whole. This means that the…
Basics 5 min read
Class and Interaction Diagrams
Class diagrams A class diagram describes the static structure of a system. It shows how a system is structured rather…
Basics 5 min read
Utility of use case diagrams
From use case diagram, it is obvious that the utility of the use cases are represented by ellipses. They along…
Basics 6 min read
Use Case Model
The use case model for any system consists of a set of “use cases”. Intuitively, use cases represent the different…
Basics 5 min read
Basic Ideas on UML
Model A model captures aspect important for some application while omitting (or abstracting) the rest. A model in the context…
Basics 6 min read
Structured Design
The aim of structured design is to transform the results of the structured analysis (i.e. a DFD representation) into a…
Basics 13 min read
DFD Model of a System
Context diagram The context diagram is the most abstract data flow representation of a system. It represents the entire system…
Basics 6 min read
Data Flow Diagrams (DFDs)
Structured Analysis Structured analysis is used to carry out the top-down decomposition of a set of high-level functions depicted in…
Basics 6 min read
Functional independence
A module having high cohesion and low coupling is said to be functionally independent of other modules. By the term…
Basics 4 min read
An Overview of Current Design Approaches
Cohesion Most researchers and engineers agree that a good software design implies clean decomposition of the problem into modules, and…
