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7 Important Stages of Software Development Life Cycle (SDLC)

Software Development Life Cycle (SDLC) and Its 7 Stages

Software Development Life Cycle (SDLC) is a framework that describes the systematic approach of developing a software, which is carried out in a step by step manner. This procedure include some specific tasks to be achieved at different phases during the software development progression.

Every aspect of software development life cycle help give direction to the development process, reason being that  each stage handles a specific part of the product – all put together to ensure that the resulting software will meet the demands of both business owners and end-users.

7 Stages of Software Development Life Cycle (SDLC)

The Software Development Life Cycle (SDLC) refers to a well-defined sequence of stages/activities, structured with a clearly defined processes and gear toward the creation of high-quality software. It also means, a model that maps the various activities performed on a software product from its inception to retirement (close).

Software Development Life Cycle framework includes the following steps:

  • Requirement analysis
  • Planning
  • Software design
  • Implementation or coding
  • Testing
  • Deployment
  • Maintenance

Stage 1: Requirement Analysis

Requirement Analysis is the most important and necessary stage in Software Development Life Cycle because if developers get it wrong at this stage, the end result will also be wrong. It includes collection of requirements for software product development from stakeholders, industry experts, and even potential customers.

It very important for teams to collect all relevant information from the client which include, a description of what the software should be, the end-user, the purpose of the software etc., developers use this information to develop the product, ensuring that they meet client expectations.

Software requirement specification (SDS) document is use to document the gathered information which is then pass to the next stage as well as kept secure for future reference.

Stage 2: Planning

After requirement gathering, the team comes up with a rough plan of development process. The team determines the feasibility of the project and how they can implement the project successfully by outlining the project scope, defining a budget, resources, deadlines, and identifying potential risks and quality assurance requirements.

Developers also analyzes if a software can be made to fulfill all requirements of the user at this stage and if the project is financially, practically and technologically feasible for the organization to take up. In addition, teams also decide a roadmap of their plan and try to bring up the best software model suitable for the project.

Stage 3: Software design

This next phase portrays a blueprint of the product, where the prerequisite document where the whole knowledge of requirements and analysis is brought forward. Software design helps to specify the hardware and requirements of the system as well as assist in crafting a significant architecture of your system.

The outcome of this step is in the form of two designs including logical design and physical design. Here, design engineers produce meta-data and data dictionaries, logical diagrams, data-flow diagrams and in some cases pseudo codes.

Stage 4: Implementation or Coding

This is considered the longest phase of Software Development Life Cycle where the actual development begins, and the programming is built. Using the design document, software developers write code for each components. The tasks are divided between the team members according to their area of specialization which include the backend developer and the front end developer, who handles the interface and the server side respectively. The result of this phase is a working software product and a Source Code Document.

Stage 5: Testing

After the completion of programming by the development team, the Quality Assurance (QA) team steps in to tests the quality of the software. The generated code is tested against the requirements to make sure that the products meets its purpose and the requirements gathered during the requirements stage.

During software testing phase, the software undergoes different kinds of tests, including functional testing, performance testing, non-functional testing, unit testing etc., where bugs and run-time errors are identify and reported back to the development term for fix.

For an effective testing process, tests are best performed systematically over several phases until a product is ready for release. The testing field also have its own life cycle called the software testing life cycle (STLC), designed with optimum software quality at its core.

Stage 6: Deployment

Once the software product is developed, tested, and completely in working form in respect to the requirement, it is then installed or deployed in the client/user’s workplace or system for their use. After the software is deployed, then its maintenance begins.

Stage 7: Maintenance

Following the deployment of the product, real issues might come up during the life cycle of the software, that may need solving from time to time. A client might also request additional features, which can be added as enhancements during this phase.


Delivering a successful and value-oriented software project requires a proper and efficient process management or engineering. In achieving this, development teams must have a full knowledge of software development life cycle and how it’s implemented.

Podtech is one of the best software development companies here in the UK, with an in-depth knowledge in the method of software project execution and a clientele ranging from startups to small, medium, and large enterprises.

With our UK and International teams working exceptionally well to adapt to the varying working styles and business needs of our clients, the success of your software project is guaranteed as we know how well to dynamically apply Software Development Life Cycle across varying projects.