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What Is the Software Development Life Cycle? SDLC Explained

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The system development life cycle (SDLC) is the overall process of developing software using a series of defined steps. There are several system SDLC models that work well for developing applications in Oracle APEX. The project manager is the overall control agent for a strong SDLC process. In SDLC, documentation is crucial, regardless of the type of model chosen for any application, and is usually done in parallel with the development process. Some methods work better for specific kinds of projects, but in the final analysis, the most crucial factor for the success of a project may be how closely the particular plan was followed.

  • If you haven’t yet started your journey as a software developer, you might ask yourself, “Is software development for me?
  • Plan for what you can control and be mindful of things you can’t plan for.
  • Red Hat and its security partner ecosystem bring a comprehensive DevSecOps approach to help organizations continue to innovate without sacrificing security.
  • The term software development lifecycle (SDLC) is frequently used in technology to refer to the entire process of technology innovation and support.
  • The development process goes through several stages as developers add new features and fix bugs in the software.
  • Broad focus on the overall development process, addressing planning, implementation, testing, and maintenance.

The immediate benefit to the client is the constant realization of the benefits in terms of the expectations of the final deliverable. This approach also ensures that the provider can constantly measure itself to interpret the requirements of – and deliver the best solution to – the client. The tools that this methodology prescribes should have built-in quality and project control measures, ensuring that a certain quality level is maintained. These properties enhance the management of time and specifications of the project. A well-structured SDLC helps development teams deliver high-quality software faster and more efficiently. Although SDLC methods vary by organization, most development teams use SDLC to guide their projects.

Object-oriented analysis and design

Also, make sure you have proper guidelines in place about the code style and practices. The waterfall model arranges all the phases sequentially so that each new phase depends on the outcome of the previous phase. Conceptually, the design flows from one phase down to the next, like that of a waterfall. Fundamentally, SDLC trades flexibility for control by imposing structure. It is more commonly used for large scale projects with many developers.

systems development life cycle (sdlc)

The Smartsheet platform makes it easy to plan, capture, manage, and report on work from anywhere, helping your team be more effective and get more done. Report on key metrics and get real-time visibility into work as it happens with roll-up reports, dashboards, and automated workflows built to keep your team connected and informed. Kanban boards visualize work items as cards in different states to provides at-a-glance insight into the status of each project and make it easy to identify any bottlenecks. To support the distinct layers within a software application, software architects use a design principle called separation of concerns. A software program that’s designed to align with the separation of concerns principle is called a modular program. The Agile SDLC model separates the product into cycles and delivers a working product very quickly.


Hence, the Agile SDLC model has recently become increasingly popular and in demand. This demand can be primarily linked to the agile model’s flexibility and core principles. By its core principles, we mean adaptability, customer involvement, lean development, teamwork, time, sustainability, and testing, with its two primary elements being teamwork and time (faster delivery). So rather than creating a timeline for the project, agile breaks the project into individual deliverable ‘time-boxed’ pieces called sprints. This model prioritizes flexibility, adaptability, collaboration, communication, and quality while promoting early and continuous delivery.

systems development life cycle (sdlc)

In traditional software development, security testing was a separate process from the software development lifecycle (SDLC). The security team discovered security flaws only after they had built the software. This led to a high number of bugs that remained hidden as well as increased security risks. The agile model arranges the SDLC phases into several development cycles. The team iterates through the phases rapidly, delivering only small, incremental software changes in each cycle. They continuously evaluate requirements, plans, and results so that they can respond quickly to change.


SDLC security is a set of processes that incorporate robust security measures and 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. Introduced in 1970, the first SDLC approach to be widely used by development teams is called the waterfall model. This method divides the software development process into sequential phases. Work flows down from one phase to another, like a waterfall, with the outcome of one phase serving as the input for the next phase. This stage includes the development of detailed designs that brings initial design work into a completed form of specifications.

systems development life cycle (sdlc)

The waterfall model works best for small projects where the requirements are well-defined, and the development team understands the technology. Updating existing software and migrating software to a new platform are examples of scenarios that are well-suited for the waterfall model. When teams develop software, they code and test on a different copy of the software than the one that the users have access to.

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