What Is the Software Development Life Cycle? SDLC Explained

What Is the Software Development Life Cycle? SDLC Explained

Additionally, it’s the phase where any fine-tuning can be performed by end users. The implementation phase is where developers produce the code needed for the program as well as the system installation. This is accomplished by the new system receiving the data and components from the previous system through a direct cutover. Fundamentally, SDLC trades flexibility for control by imposing structure. It is more commonly used for large scale projects with many developers. Once a system has been stabilized through testing, SDLC ensures that proper training is prepared and performed before transitioning the system to support staff and end users.

Phase 8 of the systems development life cycle is the post-implementation review. This phase identifies whether the system meets the initial requirements and objectives. The objective of the evaluation phase of the systems development life cycle is to deploy the system and train the system end users. Phase 6 of the initial development state of the systems development life cycle puts the software into production and runs as needed.

Planning and analysis

This is one of the most critical stages because it’s when your hard work gets put to the test. Before looking to launch a new system, it is important to first understand what is needed to develop the system successfully. The business systems analyst should have a good idea of what the company requires from a particular system while considering what the client needs from the company. The point of a good system is to marry the two needs at the most efficient and cost-effective manner.

five phases of the system 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. It’s when you gather the team to brainstorm, set goals, and identify risks. At this stage, the team will work together to devise a set of business goals, requirements, specifications, and any high-level risks that might hinder the project’s success. The System Development Life Cycle (SDLC) or the application development life cycle, for example, is an essential structure in the field of software engineering. The process includes planning, building, testing, and the overall structure of how an information system is developed and maintained.

The System Development Life Cycle (SDLC)

Students learn how to collect and document requirements, translate them to application design, and trace each project artifact to its original scope. The system specification represents the technical requirements that will five phases of the system development life cycle provide overall guidance for system design. Planning is a crucial step in everything, just as in software development. In this same stage, requirement analysis is also performed by the developers of the organization.

five phases of the system development life cycle

If it performs the tasks correctly and represents the system, the developer moves on to the next phase of maintenance within the system development life cycle. The best practices of IT risk management include minimizing risk factors in the software development lifecycle (SDLC) in order to develop a system able to counter and mitigate risks when necessary. New versions of a software project are produced at the end of each phase to catch potential errors and allow developers to constantly improve the end product by the time it is ready for market. In theory, all of the prior planning and outlined should make the actual development phase relatively straightforward. Systems analysis and design (SAD) can be considered a meta-development activity, which serves to set the stage and bound the problem.


The design stage establishes what hardware and what system requirements are needed as well as the entire system architecture. Discussions are held between the various stake holders, managers, and users to find out what the particular software will be used for. Information regarding what kind of input is required and what output is expected is collected during this stage. Once the information is collected, it is analysed to see if the requirements can be incorporated into the software that is to be developed.

five phases of the system development life cycle

By the end of this phase, the team will know what features it will have, and how its inner workings will be built. System Design is a crucial stage in the SDLC as it bridges the gap between requirements analysis and system development. It transforms user needs and functional specifications into a detailed technical plan that guides the development team. Proper system design ensures that the developed system aligns with the desired functionality, performance, and scalability requirements. The waterfall model is not in practice anymore, but it is the basis for all other SDLC models. Because of its simple structure, the waterfall model is easier to use and provides a tangible output.

SDLC Phase 7: Maintenance

Phase 3 of the systems development life cycle describes the desired features and operations of the system. The objective of the systems design phase is to transform all requirements into detailed specifications covering all aspects of the system. Finally, approval to progress to the development phase must be granted to complete the systems design phase.

  • So rather than creating a timeline for the project, agile breaks the project into individual deliverable ‘time-boxed’ pieces called sprints.
  • Developers must now move into a maintenance mode and begin practicing any activities required to handle issues reported by end-users.
  • 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.
  • This will help your team to produce organized and consistent code that is easier to understand but also to test during the next phase.
  • The analysis stage includes gathering all the specific details required for a new system as well as determining the first ideas for prototypes.
  • If the thorough analysis phase ends with a positive outlook for the project, the design phase can begin.

During the Analysis stage, the focus is on gathering and understanding the requirements of the system. This includes conducting interviews, studying existing processes, and identifying stakeholders’ needs. The gathered information serves as a basis for designing a system that meets users’ expectations and addresses organizational challenges. But None of them is perfect, and each brings its favorable aspects and disadvantages for a specific software development project or a team. After detailed testing, the conclusive product is released in phases as per the organization’s strategy. If it performs well, the organization sends out the product as a whole.

What is the Software Development Life Cycle?

The development stage is the part where developers actually write code and build the application according to the earlier design documents and outlined specifications. Developing a fully-functioning piece of software and information system is a monumental undertaking. The use of SDLC ensures that such an undertaking is properly documented and structured, making what seems impossible entirely doable within a reasonable timeframe.

five phases of the system development life cycle

They should be totally aware of the system and all its moving parts and can help guide the project by giving appropriate directions. Developers will follow any coding guidelines as defined by the organization and utilize different tools such as compilers, debuggers, and interpreters. It helps to define the problem and scope of any existing systems, as well as determine the objectives for their new systems. If you’re a business or organization and feel like you spend endless hours trying to understand all the available technology, then you’re in the right place. Learn about current file sharing and collaboration technologies like Microsoft SharePoint and the cutting-edge cloud computing.

Phases of Software Development Life Cycle and Risk Assessment

They also write use cases and share this information with the project team. The aim of the requirements analysis is for quality assurance, technical feasibility, and to identify potential risks to address in order for the software to succeed. This stage involves deploying the developed system into the production environment. This includes activities such as system installation, data migration, training end-users, and configuring necessary infrastructure. Implementation requires careful planning and coordination to minimize disruptions and ensure a smooth transition from the old system to the new one.


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