What is SDLC? Software Development Life Cycle Defined

The life cycle defines a methodology for improving the quality of software and the overall development process. In coming years, no doubt, organizations will adopt not only a DevOps approach to their SDLC, but a more evolved DevOps methodology, where security is baked into the entirety of the SDLC. In order to guarantee the success of this modern software development model, an organization must be strategic in selecting tools that support and enhance this effort. As a proven leader in the application security field, Synopsys offers a comprehensive suite of products and services perfectly tailored to this effort. This model focuses on gathering all of the customer requirements on the front end of the project so that every step of the SDLC can be planned.

sdlc life cycle

It’s important to choose your methodology based on the context of the problem that you and your team are trying to solve. After all known errors have been eliminated, the software is deployed. This is when the product is actually put into production and released in a business environment. The spiral model is one of the most crucial SDLC models that provides support for risk handling. It has various spirals in its diagrammatic representation; the number of spirals depends upon the type of project.

SDLC Iterative model:

If you are considering a transition to DevOps, ensure the team has a firm grasp of SDLC strategies before you introduce radical workflow changes. For a detailed progress report, use our real-time dashboard which features a live look at task progress, expenses, workload, and more. Plus, we have 1-click reporting features that generate reports in seconds, which can then be shared online with your customers, managers and team members.

And while software security is becoming a higher priority, for many businesses it’s still an afterthought. This SDLC model is documentation-intensive, with earlier phases documenting what need be performed in the subsequent phases. Once the required function is done, an analysis is complete with auditing the feasibility of the growth of a product.


In the Agile method, the entire project is divided into small incremental builds. All of these builds are provided in iterations, and each iteration lasts from one to three weeks. Once when the client starts using the developed systems, then the real issues come up and requirements to be solved from time to time. The development team must determine a suitable life cycle model for a particular plan and then observe to it. ALM includes the entire lifecycle of the application and continues beyond SDLC.

  • In coming years, no doubt, organizations will adopt not only a DevOps approach to their SDLC, but a more evolved DevOps methodology, where security is baked into the entirety of the SDLC.
  • You add as many triggers as you need, which set off actions that complete simple tasks and take care of busywork that would otherwise slow your team down.
  • The testing team starts testing the functionality of the entire system.
  • Fundamentally, SDLC trades flexibility for control by imposing structure.
  • By screen sharing the project board, everyone can get up to speed at a glance, improving engagement and accountability.

As SDLC methods shift more toward a DevOps SDLC, consideration of the role security plays must also be addressed. Black Duck Software Composition Analysis – secure and manage open source risks in applications and containers. In the spiral development model, the development process is driven by the unique risk patterns of a project. The development team evaluates the project and determines which elements of the other process models to incorporate. Expectations are clearly defined during this stage as well; the team determines not only what is desired in the software, but also what is NOT.

The role of security in the SDLC

The next phase is about to bring down all the knowledge of requirements, analysis, and design of the software project. This phase is the product of the last two, like inputs from the customer and requirement gathering. The spiral model combines the iterative model’s small repeated cycles with the waterfall model’s linear sequential flow to prioritize risk analysis. You can use the spiral model to ensure software’s gradual release and improvement by building prototypes at each phase. They analyze the requirements to identify smaller coding tasks they can do daily to achieve the final result.

sdlc life cycle

Despite this funnel-like approach, modern SDLC strategies are not strictly linear. The team often goes back a step or two in the SDLC to perform fixes or make improvements. Usually, this is done in a special environment, so the team can check for bugs and other mistakes without being distracted sdlc life cycle by too many variables. This can be done by a single developer, a larger team or even several teams depending on the scope of the work. Developers will need to track changes to the code and, if there are different teams working together, that they’re able to know what the others are doing.

Phase 7: Maintenance

In the design phase, software engineers analyze requirements and identify the best solutions to create the software. For example, they may consider integrating pre-existing modules, make technology choices, and identify development tools. They will look at how to best integrate the new software into any existing IT infrastructure the organization may have. Object-oriented analysis and design (OOAD) is the process of analyzing a problem domain to develop a conceptual model that can then be used to guide development. During the analysis phase, a programmer develops written requirements and a formal vision document via interviews with stakeholders.

sdlc life cycle

Following the best practices and/or stages of SDLC ensures the process works in a smooth, efficient, and productive way. The Prototyping Model used when the user requirements of the software are not understood or when they are unstable. Several prototypes are made, each using a different required function of the proposed product, then they are pieced together to create a cohesive system development. In this, the prototype developed refined incrementally according to the customer’s feedback. When the actual requirements of the clients understood, then discard the prototype, and the real product has a much better understanding of the client’s needs. It can also lead to faster feedback, reduced time finding issues, and greater user satisfaction.

How does SDLC compare with other lifecycle management methodologies?

There’s no reason not to have a separate stage for in-depth testing even if other SDLC steps have some built-in security analysis. The v-shaped model is very similar to the waterfall model, in that it also features a rigid, well-thought-out plan (this time in a v shape). However, the biggest difference between v-shaped and waterfall is that the v-shaped model has a big emphasis on testing. Testing should be completed after each phase in order to reduce errors as the team progresses through the plan.

By design, Fortify and other OpenText tools bridge the gap between existing and emerging technologies—which means you can innovate faster, with less risk, in the race to digital transformation. This model adopts the best features of the prototyping model and the waterfall model. The spiral methodology is a combination of rapid prototyping and concurrency in design and development activities.

What are the 7 phases of SDLC?

In addition, it ensures that security assurance activities such as code review, architecture analysis, and penetration testing are integral to development efforts. SDLC is a method, approach, or process that is followed by a software development organization while developing any software. SDLC models were introduced to follow a disciplined and systematic method while designing software.