CSC/ECE 517 Fall 2011/ch4 5a sp

Introduction to Object Oriented Design(OOD)

This page serves as a knowledge source for understanding the concepts covered in Lecture14- Introduction to Object Oriented Design(OOD).

Overview

Lecture 14 <ref name="CSC517">OOD, CSC 517 Lecture14</ref> of CSC 517 covered various aspects of the object oriented design including the basics of OOD principles along with the design criteria and the Class Responsibility Collaboration card tool.

Object-oriented design can be defined as the process of planning a 'system of interacting objects' for the purpose of solving a software problem. It is one approach to software design.

Criteria for Elegant Software Design

Listed below are the different criteria for elegant software design. There are nine different design considerations, out of which the first five address correctness of the software and the rest consider the performance.

Usability

Usability can be measured by the ease of use for the client.

Completeness

A software program/application is complete if it solves all the client needs.

Robustness

A good design is one that can deal with unusual situations gracefully and avoid crashing.

Efficiency

The application performs the necessary computations in a reasonable amount of time.

Scalability

An application is scalable if it performs correctly and efficiently when the problems grow in size by several orders of magnitude.

Readability

If it is easy for another programmer to read and understand the design and code, the design is readable.

Modifiability

If the software can easily be enhanced or restricted by adding new features or removing old features without breaking existing code, the design is modifiable.

Reusability

Resuability checks the ability to be reused in another completely different setting.

Simplicity

The simplicity criteria check if the design and/or the implementation unnecessarily complex.

References

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