IT Education

What Is SDLC? Understand the Software Development Life Cycle

For example, as the system analyst of Viti Bank, you have been tasked to examine the current information system. Customers in remote rural areas are finding difficulty to access the bank services. It takes them days or even weeks to travel to a location to access the bank services. In this article, We’ve listed the top five most popular SDLC models below. Next, let’s explore the different stages of the Software Development Life Cycle.

Software Development Life Cycle

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 stage includes the development of detailed designs that brings initial design work into a completed form of specifications.

Full Form of SDLC

Popular SDLC models include the waterfall model, spiral model, and Agile model. After the software is deployed, the software maintenance lifecycle begins. Software requires ongoing maintenance to ensure that it operates at peak performance. Developers periodically issue software patches to fix bugs in the software and resolve any security issues. Companies opt for this model to get valuable early feedback from customers. Users offer input on the prototype, developers implement the requested changes, and the team creates a better version of the prototype.

Other less common SDLC phases that are still worth knowing are dedicated steps for deconstructing apps, retiring software, and writing documentation. Most companies deploy new software to a small sdlc software percentage of users (10 to 15%) and slowly phase it into the rest of the customer base. Gradual introduction means you limit the impact on the UX if there’s an overlooked issue with the product.

What is Software Development Life Cycle (SDLC)?

However, the Agile model’s flexibility is preferred for complex projects with constantly changing requirements. SDLC or the Software Development Life Cycle is a process that produces software with the highest quality and lowest cost in the shortest time possible. SDLC provides a well-structured flow of phases that help an organization to quickly produce high-quality software which is well-tested and ready for production use. Based on this information, the development team can determine a timeline, a budget, and a list of key deliverables. This plan will serve as the foundation for the rest of the project, helping the team stay focused and on track as they move through the later stages. Typically, a Software Requirement Specification document is created for the requirement analysis phase.

Software Development Life Cycle

While the code still awaits advanced testing, the team should already put the product through basic tests (such as static code analysis and code reviews for multiple device types). The exact number and nature of steps depend on the business and its product goals. On average, most companies define SDLCs with five to seven phases, although more complex projects reach ten or more stages. This article goes through everything a company needs to know to adopt SDLC-based software development.

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Without strict adherence to all aspects of the parameters and design plans, a project can easily miss the mark. The coding phase includes system design in an integrated development environment. It also includes static code analysis and code review for multiple types of devices. This step involves decomposing the system into pieces, analyzing project goals, breaking down what needs to be created, and engaging users to define requirements. During this step, current priorities that would be affected and how they should be handled are considered.

  • For example, the GitHub platform scans code for security issues as it’s written in the coding phase.
  • An output artifact does not need to be completely defined to serve as input of object-oriented design; analysis and design may occur in parallel.
  • This allows any stakeholders to safely play with the product before releasing it to the market.
  • This typically involves creating and executing a deployment plan that outlines the steps and procedures for installing and configuring the software.

Each SDLC model offers a unique process for your team’s various project challenges. The project’s specifications and intended results significantly influence which model to use. For example, the waterfall model works best for projects where your team has no or limited access to customers to provide constant feedback.


Best practices support the detection and remediation of security issues early in the lifecycle—before the software is deployed to production. The SDLC process involves several distinct stages, including planning, analysis, design, building, testing, deployment, and maintenance. Without using an exact life cycle model, the development of a software product would not be in a systematic and disciplined manner. When a team is developing a software product, there must be a clear understanding among team representative about when and what to do. Suppose a software development issue is divided into various parts and the parts are assigned to the team members. From then on, suppose the team representative is allowed the freedom to develop the roles assigned to them in whatever way they like.

Different software development methodologies will have slightly different versions of the SDLC, with different names for each phase or even different steps entirely. To get ahead of security issues, some teams are using development platforms that build security analysis into their workflow. For example, the GitHub platform scans code for security issues as it’s written in the coding phase. Maintenance activities also include performance monitoring of both the software’s technical performance and how users perceive its performance.

S. Reliability Models

The lack of extensive pre-planning generally allows software to be written much faster and makes it easier to change requirements. Once the requirement analysis is done the next step is to clearly define and document the product requirements and get them approved from the customer or the market analysts. This is done through an SRS (Software Requirement Specification) document which consists of all the product requirements to be designed and developed during the project life cycle. SDLC is a process followed for a software project, within a software organization. It consists of a detailed plan describing how to develop, maintain, replace and alter or enhance specific software. The life cycle defines a methodology for improving the quality of software and the overall development process.

Software Development Life Cycle

The six stages of the SDLC include planning, defining requirements, design, development, testing and finally deployment. This stage is usually a subset of all the stages as in the modern SDLC models, the testing activities are mostly involved in all the stages of SDLC. However, this stage refers to the testing only stage of the product where product defects are reported, tracked, fixed and retested, until the product reaches the quality standards defined in the SRS. Requirement analysis is the most important and fundamental stage in SDLC.

The programming language is chosen with respect to the type of software being developed. In the iterative process, each development cycle produces an incomplete but deployable version of the software. The first iteration implements a small set of the software requirements, and each subsequent version adds more requirements. 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 tangible deliverables produced from this phase include project plans, estimated costs, projected schedules, and procurement needs. The planning phase encompasses all aspects of project and product management.

Software Development Life Cycle