What is Software Engineering?

Introduction to Software Engineering:

The software is composed of data, programs, and documents. Each of these items specifies a configuration that is created as part of software engineering. The software has the key Element in the evaluation of computer-based system and products. Software Engineering is instructions means a computer program that is executed and provides desired functions and performance.

Software is a logical system element. It is documents that describe the operation and use of programs.

Software Engineering is to provide a framework for creating software with higher quality.

Software Engineering is that branch of Engineering where the software is developed using  well tested well proved Engineering principles, procedures and the respective method. So that is Software Engineering. So let us discuss how the software engineering have been defined by different  persons and organizations.


What is software Engineering

~Fritz Bauer

Software Engineering is the establishment and use of sound engineering principles, methods, tools that can be used to produce high quality software that is reliable and work efficiently on real machines.


The application of a systematic, disciplined quantifiable approach to the development operation and maintenance of software, that is the application of engineering to software.

Let us understand what is software engineering stands for, the term is made of two-word “Software and Engineering“.

What is Software?

The software is more than just a program code. A program is an executable code, which serves some computational purpose. The software is considered to be the collection of executable programming code, associated libraries, and documentation. Software, when made for a specific task or requirement, is known as Software product.

We know that whenever we write a program in some specific language then obviously it is having some purpose and then in a program should be executed through the executable version of the program.

So, what is the software product? So software is nothing but whenever a particular software is executing that means it is taking help of multiple executable codes the respective libraries and the documentation. Software when it is made for a specific requirement will be known as the software product. So whenever a particular software will be developed for a certain purpose only they need to be known as a software product.

Software development process transformation

Software Development process life cycle

SO now let us consider the four phases toshow you that what are the software devlopment process transformation.  So at first User needs and expectations are to be gatheerd so all these user need respective requirement expectations are to be listed and then transformation 1 which is having a name know as analysis when the problem statement will be developed  then the transformation two that is known as the design phase in this phase from the problem statement will be going for the detailed design in the transformation number three the result of implementation phase where the particular software is designed this particular format will be implemented as the software product. So, these are the different phases and transformation.


What is Engineering?

Whaunit testing

Now, let us discuss What is Engineering? Engineering on the other hand, is all about developing products, using well defined, scientific principles and methods and procedures.

Everything that you use in day to day life like the smartphone, laptop, car are all products of Engineering products. We are surrounded by engineering practically every moment of our life.

So, what is Exact definition of Engineering.?


What is Software Engineering?

Software Engineering is that branch of Engineering where the software is developed using well tested well proved  Engineering principles, procedures and the respective method. So that is Software Engineering. 

The Software Engineering is an engineering branch associated with the development of software product using well defined scientific principles, methods, and procedures. The outcome of software engineering is an efficient and reliable software product.                  Software Engineering is the application of a systematic dispensed and quantifies will approach to development, operations, and maintenance of software. That is the application of engineering to software. Software engineering is the application of a systematic disciplined applied throughout the entire software lifecycle.


Introduction to software Engineering
Introduction to software Engineering

So, the process of developing of the software product using software engineering principles, procedures and methods are referred to as software evolution. So now let we discuss what is software evolution? 

What is Software Evolution?

The process of developing a software product using software engineering principles and methods is referred to as Software Evolution. This includes the initial development software and it’s maintenance and updates, until the desired software product is developed, which satisfies the expected requirements.

We know that whenever a particular software is developed for a specific application or purpose then it will be known as the software product. And here we will be using engineering well-tested principles, procedures, and methods in the development process.

So, We know that at the beginning we shall ask the respective stack holder regarding the expectations and the requirement of the software and this software development will not a terminated until the requirements and expectations are implemented.

Evolution starts with the requirement gathering process. After which developers create a prototype of the intended software and show it to the users too get their feedback at the early stage of the software product development. The user suggests changes, on which several consecutive updates and maintenance keep on changing too. This process changes to the original software until the desired software is accomplished. 

So at first, we might be creating a prototype of the software where prime functionalities will get implemented and we shall demonstrate that prototype to the  client and if the client is saying yes it is in the right track then we will be proceeding otherwise be depending upon the feedback  that the respective changes at to be done on the product.

Even after the user has the desired software in hand, the advancing technology and the changing requirements force the software product to change accordingly. Re-creating software from scratch and to go one-on-one with the requirement is not feasible. 


Now we discuss a lot about software engineering what the scientist says about software engineering, the evolution of software engineering, what is software, what is engineering and much more int the question What is Software Engineering. Now in this question what is software engineering let us discuss for more understanding that what is the need of Software Engineering. Because if we don’t know why the Software Engineering we need we can’t complete the answer of question what is Software Engineering. So, without losing any much more time let’s start the question what is the need of software Engineering.?



What is need of Software Engineering?

The need for software Engineering arises because of a higher rate of change in user requirement and environment on which the software is working following are some of the needs started.

  • Large Software –  It is easier to build a wall than a house or building, likewise, as the size of the software becomes large, engineering has to step to give it a scientific process.
  • Scalability-  If the software process were not based on scientific and engineering concepts, it would be easier to re-create new software than to scale an existing one.
  • Dynamic Nature- Always growing and adapting nature of the software hugely depends upon the environment in which the user works. If the nature of software is always changing, new enhancements need to be done in the existing one. This is where software engineering plays a good role.
  • Quantity Management-  The Better process of software development provides better and quality software product.    


Now let us discuss what the definition means. So, we know that the change request the changes will be demanded on the existing software and that change may be due to the change in the clients or users requirement or due to the change in the environment which the software is working. So following are some of the needs stated. So, the first one is the Large Software

Large Software

 It is easier to build a wall than a house or building, likewise, as the size of the software becomes large, engineering has to step to give it a scientific process.”

so that we can develop the large software. The large software means it can consider as a combination of multiple modules so we can develop multiple modules and later we can integrate them and we can get the shape of the Large Software. So, In this way, there are different processes in which we can develop a large software and those processes in which is suggested by the Software Engineering.


“If the software process were not based on scientific and engineering concepts, it would be easier to re-create new software than to scale an existing one.” 

So whenever a change request will be coming then obviously will be carrying out those changes we shall implement those changes in the existing version of the software. It is not like that we shall go for a new creation of another software which will be beyond our budget and beyond our deadline. So that’s why so this particular software process must have the scientific and engineering concepts so that we can reflect new changes in the existing one.

Dynamic Nature

 Always growing and adapting nature of the software hugely depends upon the environment in which the user works. If the nature of software is always changing, new enhancements need to be done in the existing one. This is where software engineering plays a good role.”

So always whenever software is having a version 1.0 after a couple of months after a couple of days or after a couple of weeks the new requirements will be originated will be originating. So as the results of that we will go for the next software for the same version. And those implementations of the new changes in the software is defeating that the dynamic nature of the software.

Quantity Management

“The Better process of software development provides better and quality software product.” 

Soo whenever we are implementing the software engineering in this engineering concepts on to the software development processes. Then obviously we can ensure that our software will be with the better and good quality which was expected from the client side and from the user side. 


SO we have described, we have discussed what are the needs of software engineering in the software development process.

Characterstics Of Software Engineering

  1. The software is developed it is not manufactured. High-quality software is achieved through good design. It requires the construction of a product. Software cost is concentrated in Engineering.
  2. Software does not ” wear out”, but it does determinate during its life. The software will undergo change (maintenance) as changes are made it is likely that some new defects will be introduced. When a hardware component wears out it is replaced by spare part. There is a no software spare part. Every software failure indicates an error in designed or in the process through which design was translated into machine executable code. Therefore software maintenance involves more complexity then hardware maintenance.
  3. The industry is moving towards component-based assembly most software continue to be custom built. A software component should be designed and implemented si that it can be reused in many different programs. 
    In 1960 we built scientific subroutine(function) that was reusable in a scientific application. These subroutines reuse a well-defined algorithm in an effective manner but had a limited domain of application. Today we have extended our view of reuse is that it does not the only algorithm but also data structure. Modern reusable components encapsulate both data and processing applied to the data, therefore, software engineering is used to create a new application from reusable parts. 

    For Example, today graphical user interface is built using reusable components that enable the creation of graphics window pull-down menu and a wide variety of interaction mechanism.

Emergence Of Software Engineering

1)Early Computer Programming

In the initial state, computers were very slow and too complex. For a simple program took more time on those programs were usually were written in assembly language. Program length was typically limited to about few 100 of lines. At that times programmers wrote the program without formulating any proper plan or designed. This type of style of programming is known as exploration programming style.

2)High-Level Programming Language

The computer becomes a faster test with the introduction of semiconductor technology. Faster semi-conductor translator replaced vacuum tube circuits in a computer. Then it was easy to solve the large and complex problem. At this time high-level languages are FORTRAN, ALGOL, and COBOL  where introduced. However, programmers were still using the exploratory style of software development.

3)Control Flow-Based Design

As the size and complexity of program kept on increasing so programmers found it too difficult not only to write correct programs but also to understand and maintain programs written by other. To remove this problem programmer advised other programmers to pay particular attention to be designed of a program that is control flow structure.

A program control-flow structure indicates the sequence in which the program’s instruction is executed. So for good control flow structure, the flowchart technic was developed. Even today the flow chart technic is being used to represent and design algorithm programs.

4)Data Structure Oriented Design

The computer becomes more powerful with the integrated circuit. It could be used to solve the complex problem. It was developed to pay attention to the design of its control structure. Design techniques based on the principle are called Data Structure Oriented Design Technique. Data Structure Oriented Design Technique is the Jackson structure programming(JSD) technique developed by Michael Jackson in 1975. In JSP a program data structure is first design using selection and iteration.

5) Data Flow Oriented Design

As computer became still faster and more powerful with the introduction of Very Large Scale Integrated Circuit (VLSI) and some new architectural concept. The data flow oriented techniques that the measurement data item handled by the system. Must we identify and the processing required on these data items to produce the desired output should be determined.

The function also called a processor and data items that are exchanged between different functions are represented in a diagram known as Data Flow Diagram.

6)Object-Oriented Design 

Data Flow Oriented Design envolved into object-oriented design techniques. In object-oriented Design technique where the natural designed where the natural designed techniques( object) relate to the problem are first to identify and then the relationship among the object such as reference and inheritance are determined. So it can be seen that remarkable improvements to the software design technique occur. In addition to changes made to the software design technique several other new concepts and technique for effective software development, there also introduced these new techniques include life cycle models, specification technique, project management technique, testing technique, debugging technique, quality assurance technique, software measurement technique etc.



What is Software Engineering? Now I hope you got your answer. I have tried to give you answer with explanation and basic definition for preparation of examination. If there is something left please comment down I will add it in this article or if in this article if some fault please comment down. Your feedback is very important for us so please try to comment. Thanks for reading our article.


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