Evolutionary Model is an important model of software development life cycle. In this tutorial we have explained the evolutionary process model in software engineering in more detail.

I hope this tutorial will be helpful for computer science students in understanding the concepts of evolutionary model in software engineering.

Frequently Asked Questions

After reading this evolutionary process model in software engineering tutorial  students will be able to answer the following  frequently asked questions.

• What is evolutionary model in software engineering ?
• What are benefits of evolutionary development model ?
• Why are evolutionary model considered best approach to software development ?

Let’s start with introduction of evolutionary model.

What is Evolutionary Model in Software Engineering ?

• Evolutionary process model in software engineering is also referred as the incremental model of software development.
• This model is mainly used in Agile approach of software development. The whole product is developed in iterative and incremental manner.
• In evolutionary process model  software requirements are broken in several sub modules like M1, M2, M3……Mn. These sub modules are designed and developed in form of release. In first iteration module M1 is developed and delivered.
• In second iteration module M2 is developed and integrated with module M1.
• Now this increment M1+M2 is delivered to customer after second iteration. In the same way whole software is developed and in the end final software product is delivered to customer.

Basic Evolutionary model diagram is shown in following Figure.

• First the core modules that don’t need the service from others modules  are developed.
• Each successive version or model of the software product is a fully functioning software capable of performing more work than the previous versions or model.
• Every deliverable should be meaningful for the customer. It should perform a functionality of the software.
• This model is normally used to develop the large software consist of large number of functionality.

Various phases involved in each iteration are as shown in the above figure. Tasks are categorized into phases and are ”time-boxed”, that is, time frames are allotted to each task.

Each time-boxed phrase is called a sprint. Each Sprint has a defined duration of time, say, a week, few days or month.

Also Read – Round robin scheduling in OS

Benefits of Evolutionary Process Model in Software Engineering

Some time a question is asked in technical interview that what are the benefits of evolutionary process model ?

Here we have listed the following benefits of evolutionary process model in software engineering.

• Evolutionary process model is very helpful in building the large software product.
• This model also provides a chance to user to experiment with a partially developed software much before the complete version of the system is delivered. It becomes easy for the developer to remove the bugs and defects in early stages of software development.
• Evolutionary process model helps to accurately elicit user requirements during the delivery of different versions of the software.
• In evolutionary model, this is easy to modify and add new functionality during the development of the software.
• Evolutionary Model approach is Agile Approach for Software Development.

Disadvantages of Evolutionary Model

This is Difficult sometime to divide the problem into several modules in such a way that these  would be acceptable by the customer and which can be implemented in incremental and iterative manner.

Special Evolutionary Model Question 

A special questions about evolutionary model is also asked din competitive examination.

This questions is given here

Which among the following is evolutionary process model ?

a. WINWIN Spiral Model
b. Incremental Model
c. Concurrent Development Model
d. All are Evolutionary Software Models

Answer : Option d is the right answer of this question.

All a, b ,c are evolutionary model example.

Conclusion and Summary

Today in this tutorial we have explained about the Evolutionary  Process Model , benefits of evolutionary process model in software engineering and some disadvantages of evolutionary model diagram.

I hope this tutorial will be helpful for computer science students.

I kindly request to readers, please give your feedback and suggestion. If you find any mistakes in this tutorial, then comment.

Don’t stop learning and practice.

Software Engineering More Tutorial are Here – Software Engineering Tutorial