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What is SDLC? Software Development Life Cycle Definition & Guide

By June 12, 2024IT Education

The most important distinction between the two SDLC methodologies lies in terms of prioritizing customer satisfaction. The Agile model makes customer satisfaction a priority from the very beginning. Consequently, the project teams involved respond instantly to stakeholder feedback throughout the SDLC procedure. Also known as the deployment phase, the implementation phase occurs right after the successful testing of the software product.

If a result falls short of expectations, you will return to requirement analysis. At the conclusion of this phase, the team and software architecture are established, enabling you to proceed to the subsequent phase. The adoption of his technology is proof that SDLC, when applied and executed correctly, can lead to profound technological and business outcomes.

GitHub’s DevOps Solution

The agile model is both iterative and incremental, making it more efficient than other process models. Due to increasing cyberattacks and security breaches, development teams are under pressure to improve application security. SDLC security is a set of processes that incorporate robust security measures and sdlc software testing into the SDLC. Best practices support the detection and remediation of security issues early in the lifecycle—before the software is deployed to production. Learn about the software development lifecycle (SDLC) and gain valuable insights into its essential phases, methodologies, and best practices.

sdlc methodology

This article will explain how SDLC works, dive deeper in each of the phases, and provide you with examples to get a better understanding of each phase.


For example, the GitHub platform scans code for security issues as it’s written in the coding phase. Although it is beyond the purview of this article, there is another more complex framework within Agile that is called SCRUM. This methodology is used for large, extremely complex projects and has even been used outside of software development. Teams should design tests that align with the goals established during the first three stages of the SDLC. After they design the tests, teams should run the tests and identify results that don’t meet expectations. If an application doesn’t pass all tests, teams may need to update some of the code from the previous stage to fix the issue and then run the tests again.

  • Some contend that there are just five or six main steps in the SDLC, for example.
  • Each stage’s beginning (except for the first) and completion is contingent on the previous stage’s completion/transfer of information.
  • There are seven stages in the SDLC and six common models that are used for different projects.

If it performs well, the organization sends out the product as a whole. After retrieving beneficial feedback, the company releases it as it is or with auxiliary improvements to make it further helpful for the customers. Jira is a popular project management application developed by Atlassian that is used for issue tracking, bug tracking, and agile project management. A popular agile team tool for implementing continuous integration and continuous delivery. It supports Scrum, Kanban, and hybrid techniques and is very customizable. Larger and more complicated projects may necessitate a more structured approach, such as the waterfall model.

SDLC phases and how they work

Smaller and less complex projects, such as the scrum model, may be able to employ a more agile methodology. The SDLC ensures that the finished product meets or exceeds customer expectations by offering a systematic approach to software development, resulting in increased customer satisfaction. The SDLC can help to increase productivity by offering a structured approach to software development. This can assist developers in focusing on the most important tasks and avoiding time-wasting activities. Once the software application is fully developed and tested, it moves to the release phase. It’s best practice (and genuine wisdom!) to do practice releases prior to the actual release as a way to find and fix defects.

sdlc methodology

My friend wanted to start the a company and reached out to me and others for guidance. I advised him to use SDLC to first perform a requirements analysis even though his ambitions were quite large. Before writing content the author must first define the requirements, plan what will be written, and then actually put pen to paper. Software development – as we all know – is a broad domain and can cover website design tools and online forms to more robust machine learning or backend systems. Some ideas include your clients, designers, your boss, or other technical representatives on the team.

What is the software development life cycle?

This high-risk SDLC model throws most of its resources at development and works best for small projects. It lacks the thorough requirements definition stage of the other methods. The Agile SDLC model separates the product into cycles and delivers a working product very quickly. Testing of each release feeds back info that’s incorporated into the next version. According to Robert Half, the drawback of this model is that the heavy emphasis on customer interaction can lead the project in the wrong direction in some cases.

sdlc methodology

These six phases map to behavior you might already be implementing when scoping, building, testing, and releasing software. The tools can help to improve software development quality, lower expenses, and increase efficiency. At this phase, the software is maintained and issues will need to be resolved. This could include bug fixes, new features, or software updates to reflect changes in the system environment.

Is Waterfall a Methodology?

Enhance your understanding of this crucial process to drive successful software development projects. In the past, the most popular development model was the Waterfall model, which entailed pushing out changes to applications in large, infrequent iterations. Today, Waterfall has largely given way to Agile software development, which encourages teams to break application updates into small chunks of work and manage them using short sprints. Agile is often more efficient for developers because it lets them set small, manageable targets. It can also benefit users, who receive updates on a more regular basis and do not have to contend with huge application overhauls that hit them all at once.

In IBM’s Full Stack Software Developer Professional Certificate, you’ll build job-ready skills and create professional projects for your portfolio. The University of Minnesota’s Software Development Lifecycle Specialization explores traditional, secure, Agile, and lean software engineering development processes. DevOps is an approach to SDLC that combines development (dev) and operations (ops) to speed the delivery of quality software. The core principles of this approach are automation, security, and continuous integration and continuous delivery (CI/CD), which combines the SDLC into one integrated workflow. The agile methodology is well-suited for projects that require flexibility and the ability to quickly adapt to changing requirements. Because it encourages collaboration, agile is also well-suited for complex projects where many teams work together.

App & Browser Testing Made Easy

With an average length of two to four weeks, Scrum is an Agile framework that organizes work into time-limited phases called sprints. It takes a collaborative approach, with a Development Team building the parts of the product, a Scrum Master leading the process, and a Product Owner determining what’s important. Through activities like Sprint Planning, Daily Scrum, Sprint Review, and Sprint Retrospective, Scrum promotes flexibility, ongoing improvement, and frequent feedback. Agile project management adheres to the Pareto principle, which states that 20% of effort yields 80% of results.

sdlc methodology

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