7 Phases Of The System Development Life Cycle Guide

Depending on the subject of the project, the design phase can include diagrams, flow charts, sketches, and schemas. Usually, once the design is finalized in this stage, it is hard to make changes in the later stage. During the planning stage, the experienced software engineers will define the problem and scope of the existing systems and determine the objectives for building new systems. Ensure that you get a credible cost estimation in the planning stage itself. Supported by industry-leading application and security intelligence, Snyk puts security expertise in any developer’s toolkit.

  • It defines different stages that are necessary to bring a project from its initial idea or conception all the way to deployment and later maintenance.
  • This in turn helps the development company to optimize the flow of their operations.
  • From then on, suppose the team representative is allowed the freedom to develop the roles assigned to them in whatever way they like.
  • The publication popularized the notion that software projects needed to respond to change quickly and could not be hindered by excessive bureaucracy.
  • Top custom software development companies follow a robust software development methodology.

Before any system planning is done, a feasibility study should be conducted to determine if creating a new or improved system is a viable solution. This will help to determine the costs, benefits, resource requirements, and specific user needs required for completion. The development process can only continue once management approves of the recommendations from the feasibility study. The life cycle approach is used so users can see and understand what activities are involved within a given step. It is also used to let them know that at any time, steps can be repeated or a previous step can be reworked when needing to modify or improve the system.


As two utterly different approaches to software development, Agile and Waterfall are suitable for different kinds of projects. The Waterfall model is a good solution for projects with stable and defined requirements, whereas Agile is best suited for projects with varying requirements. Understand that larger systems may require longer maintenance as compared to smaller systems. The complexity involved in the software life cycle makes the team lose track and won’t adhere to the pre-defined requirements. That’s why making the team mandatorily follow the design plan ensures the team hit the sweet spot.

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Developers will follow any coding guidelines as defined by the organization and utilize different tools such as compilers, debuggers, and interpreters. The design stage is a necessary precursor to the main developer stage. Testing is the next phase which is conducted to verify that the entire application works according to the customer requirement. The main focus of this SDLC phase is to ensure that needs continue to be met and that the system continues to perform as per the specification mentioned in the first phase. This SDLC model is documentation-intensive, with earlier phase documenting what need be acted in the subsequent phase. As Mitt Romney rightly said – “Starving research and development is like eating seed corn”, when we fail to put enough work into our research and analysis, we fail to deliver the right product.

Agile Software Development Life Cycle

When the prerequisite analysis phase is finished the next sdlc step is to define and document software needs. This process conducted with the assistance of ‘Software Requirement Specification’ document otherwise called ‘SRS’ document. It incorporates everything that which ought to be designed and created during the project life cycle. In a post-production, live software environment, the system is in maintenance mode. No matter the number of users, the sophistication of the software and rigorous QA testing, issues will occur.

In this phase, Developer needs to follow certain predefined coding guidelines. They also need to use programming tools like compiler, interpreters, debugger to generate and implement the code. Requirements Gathering stage need teams to get detailed and precise requirements. This helps companies to finalize the necessary timeline to finish the work of that system.

The client requirements are collected from interactive workshops or targeted user based groups. This is followed by rapid testing of the prototypes and integrated iteratively to form the whole product. V-model place the stages of the systems development life cycle in order is an augmented waterfall model where each coding stage is synchronized with the testing phase. Each phase is verified and validated by means of test cases and test plans are generated at every stage.

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Product program code is built per the design document specifications. In theory, all of the prior planning and outlined should make the actual development phase relatively straightforward. This model works best for small projects with smaller size development team which are working together.

Many organisations opt to have the system tested elsewhere first, in a special testing environment. By adding new steps, developers could define clearer and more effective actions to reach certain goals. The developers should thoroughly follow this document and also should be reviewed by the customer for future reference. In this stage, all the requirements for the target software are specified. These requirements get approval from the customers, market analysts, and stakeholders. HLD is abbreviated as High-Level Design that provides system design for database and functional architecture for all the modules and sub-modules.

Intro To Agile Development Life Cycle

We also suggest encouraging teams to use the Snyk CLI interface and IDE plugins that we offer. The further left you integrate Snyk in the development process, the easier it will be to fix issues that may arise. The SDLC phases serve as a programmatic guide to project activity and provide a flexible but consistent way to conduct projects to a depth matching the scope of the project.

With all the complex processes involved in software development, it’s easy to forget the fundamental process for a successful software development life cycle . The SDLC process includes planning, designing, developing, testing and deploying with ongoing maintenance to create and manage applications efficiently. When faced with the task of producing high-quality software that meets a client’s expectations, requirements, time-frame, and cost estimations; understanding the SDLC is crucial.

The third phase is the moment when end users have an opportunity to discuss and decide their specific information needs. This is also the phase where essential components of the system and structure are considered. Regardless if the team works with a document of functional requirements or a handwritten list, everyone must be able to understand each proposal, and each comment, to be involved.

Software Testing Stage

The main focus of this SDLC phase is to guarantee that requirements keep on being met and that the system keeps on proceeding according to the detail referenced in the first phase. This stage gives a more clear image of the scope of the whole project and the expected issues, opportunities, and directives which triggered the project. Improper allocation of resources and their responsibilities can lead to complexity and may adversely affect the productivity of the team.

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The benefit of this approach is that product owners can see the results of each short cycle, provide their feedback, and make corrections if needed. At the beginning of the next cycle, software developers revise the previous version of the product and present it for the next round of feedback. As such, the Agile software development life cycle is known as a continuous process. The tested version of the software is shipped to the market for beta testing.

System Development Life Cycle Sdlc

The software development life cycle typically has 7 stages of software development. Here’s a brief breakdown of the various phases in the life cycle of Software Development Process. If a business determines a change is needed during any phase of the SDLC, the company might have to proceed through all the above life cycle phases again. Even though some steps are more difficult than others, none are to be overlooked. An oversight could prevent the entire system from functioning as planned. The second phase is where businesses will work on the source of their problem or the need for a change.

A typical OOA model would describe computer software that could be used to satisfy a set of customer-defined requirements. During the analysis phase of problem-solving, a programmer might consider a written requirements statement, a formal vision document, or interviews with stakeholders or other interested parties. The task to be addressed might be divided into several subtasks , https://globalcloudteam.com/ each representing a different business, technological, or other areas of interest. The systems development life cycle originally consisted of five stages instead of seven. These included planning, creating, developing, testing, and deploying. Planning phase is the most significant stage in the software development life cycle as it forms the foundation for the rest of the stages.

Agile methodology is a practice which promotes continue interaction of development and testing during the SDLC process of any project. 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. In this type of SDLC model testing and the development, the phase is planned in parallel. So, there are verification phases of SDLC on the side and the validation phase on the other side.

Openness, trust, and autonomy are slowly becoming valuable cultural resources for companies looking to attract the best talent and use them to their fullest. The experience of these companies confirms that teams can take different approaches to agile if they follow the fundamental principles of this methodology. Teams of different stages do not communicate with each other, each team is clearly responsible for its stage. At any moment in time, you can easily understand whether this or that control point was passed or not, and whether the deadlines were met. For these reasons, long-term and particularly large projects spanning decades and involving numerous participating organizations are primarily guided by a waterfall. Following the agile process steps, the software is reviewed by the team for any defects, errors, faults, and the registration of winnings and losses, prior to the release of the final product.


In other words, a life cycle model maps the various activities performed on a software product from its inception to retirement. Different life cycle models may plan the necessary development activities to phases in different ways. During any life cycle stage, more than one activity may also be carried out. Planning is the crucial step in everything and so as in software development.

The testers will test the software and find out any bugs or defects that need to be fixed and retested later. The list of software requirements developed in the previous software development phases is used to make design choices. Another major objective of the planning stage is to secure funding and resources needed to materialize the plan.

Software development life cycle is a series of steps that a team of software developers must follow to develop and maintain software. Software development is a complex process, and it has a lot of moving pieces in it. A software development guide helps to develop successful software and makes the process easy. Right from preparing your requirements to ensuring the timely delivery of the software, you, as an entrepreneur, need to take care of a lot of things. We hope that the software development process guide provided above will help you achieve your software development goals.