Software Development Life Cycle Model (SDLC)

What is Software Development Life Cycle (SDLC)?

The Software Development Life Cycle (SDLC) is a process that outlines the steps involved in creating a software product. It provides a framework for the development and maintenance of software products, and it helps organisations ensure that the software they create meets the needs of users and stakeholders.

What is Software Development Life Cycle

Processes included in Software Development Life Cycle

There are many different models for the SDLC, but most of them include the following phases:


This phase involves identifying the goals and objectives of the software project, determining the resources and budget required, and creating a project plan.


In this phase, the requirements for the software are gathered and analysed. This may involve conducting user interviews, creating user stories or user scenarios, and defining the functional and non-functional requirements of the software.


During the design phase, the software architecture and user interface are created. This may involve creating mockups, wireframes, and prototypes, as well as defining the technical architecture of the software.


In this phase, the code for the software is written. This may involve writing individual modules or features, integrating them into the larger system, and testing them to ensure they work correctly.


During the testing phase, the software is thoroughly tested to ensure that it meets the requirements defined in the analysis phase and functions correctly. This may involve creating test cases, running automated tests, and conducting user acceptance testing.


Once the software has been thoroughly tested and is ready for release, it is deployed to production environments where it can be used by end users.


Even after the software has been deployed, it will need ongoing maintenance to fix bugs, add new features, and make other improvements. This phase involves monitoring the software for issues, addressing them as needed, and releasing updates and patches to keep the software running smoothly.

Various models used in Software Development Life Cycle

Software Development Life Cycle Models

There are several different SDLC models that have been developed over the years, each with its own unique approach to the software development process. Some of the most common SDLC models include:

Waterfall model:

This is a traditional and linear approach to software development, in which each phase of the process is completed before moving on to the next.

Agile model:

This is a flexible and iterative approach to software development, in which the process is divided into small, incremental phases called “sprints.”

Scrum model:

This is a popular variation of the agile model, in which a team works collaboratively to deliver small, incremental improvements to the software in short, intense bursts of activity called “sprints.”

Lean model:

This is an approach to software development that emphasises the importance of continuously improving the efficiency of the process and eliminating waste.

DevOps model:

This is an approach to software development that combines the principles of agile and lean methodologies with a focus on automation and collaboration between development and operations teams.

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