Some of the definitions are given below:

NATO Science Committee

Software Engineering is promoting the establishment of theoretical foundations and practical disciplines for software, similar to those found in the established branches of engineering.

Fritz Bauer

Software Engineering is the establishment and use of sound engineering principles in order to obtain economical software that is reliable and works efficiently on real machines.

Advantages of Using Software Engineering

Software engineering as a discipline provides tools and techniques for developing the software in an orderly fashion.

The advantages of using software engineering for developing software are as follows:
•    Improved requirement specification.
•    Improved cost and scheduled estimates.
•    Improved quality.
•    Better use of automated tools and techniques.
•    Less defects in final product.
•    Better maintenance of delivered software.
•    Well defined processes.
•    Improved reliability.
•    Improved productivity.

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