SOFTWARE ENGINEERING; A LAYERED APPROACH.

Software Engibneering is a Layered Approach.

►Quality Focus.
►Process Layer.
►Methods.
►Tools.

►Quality Focus.

Any engineering approach must rest on organization committment to Quality. Foster a continuous process improvement culture. This is the culture that altimately leads to the development of increasingly more mature appraches to software engineering.
The bedrock that supports the software engineering is a focus on Quality.

►Process Layer.

Process layer is:

♦Foundation of software engineering.
♦Glue that holds the technology layer togrther.
♦Enables rational and timely development of component software.

►Methods.

Methods:

♦Provide technical "How to" for building software.
♦Encompases a broad array of tasks i.e.
♦Requirements Analysis.
♦Design.
♦Program Construction.
♦Testing.
♦Maintinance.
♦Include modeling techniques.
♦Rely on set of basic principles.

►Tools.

Tools provide supports for process and methods.

CASE.

When tools are integrated so that the information created by one tool can be used by another , then the system to support the software development, called Computer Aided Software Engineering.