What is Systems Development Life Cycle? Definition from WhatIs com

Phase 4 of the systems development life cycle is when code is written for the desired features and operations. Programming tools like compilers, interpreters, and language are used for coding. The software development lifecycle (SDLC) outlines several tasks required to build a software application.

system development life cycle stages

The Hunter Business School Web Application Design and Development program has a class that teaches the system development Life cycle. Today, most teams recognize that security is an integral part of the software development lifecycle. You can address security in SDLC following DevSecOps practices and conducting security assessments during the entire SDLC process. A software system development life cycle stages development lifecycle (SDLC) model conceptually presents SDLC in an organized fashion to help organizations implement it. Different models arrange the SDLC phases in varying chronological order to optimize the development cycle. Here, the team will gather and analyze the user requirements and prepare a document called Software Requirement Specification (SRS).

Stage 6: Maintain

According to Robert Half, the drawback of this model is that the heavy emphasis on customer interaction can lead the project in the wrong direction in some cases. It’s critical to follow the seven phases of the System Development Life Cycle whenever you’re working on a new product. Again, because SDLCs rely heavily on documentation and guidelines, it’s a team effort, and losing even a key person won’t put the project’s deadline in jeopardy. This method results in several release cycles, during which each iteration is tested, bugs are resolved, and input from stakeholders is gathered.

system development life cycle stages

He has a diverse range of professional and academic interests and experience. His extensive background in technology, software development, and data analytics is paired with many years working with end-users to design and deploy a variety of systems and applications. The plan also provides cost estimates, financing approaches, and a time line. Conducting a feasibility study and performing a SWOT (strengths, weaknesses, opportunities, and threats) analysis are important tools to be used in this stage. Phase 9 of the systems development life cycle is when plans are initiated to discard system information, hardware, and software in a transition to a new system.

System Development Life Cycle

The difference with the Agile approach in software is the focus on customer satisfaction throughout the entire lifespan of a system. An existing system is replaced by a new system that consists of replaced components or modules to ensure that it meets new requirements. SAD is mostly used to find a balance between requirements https://www.globalcloudteam.com/ at a higher level. During the fifth phase the system is installed in the production environment. Many organisations opt to have the system tested elsewhere first, in a special testing environment. The third phase is the moment when end users have an opportunity to discuss and decide their specific information needs.

This will prevent them from overdrawing funding or resources when working at the same place as other development teams. 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.


Once complete, development managers will prepare a design document to be referenced throughout the next phases of the SDLC. The System Development Life Cycle encompasses a series of interconnected stages that ensure a systematic approach to system development. The stages include Planning, Analysis, Design, Development, Implementation, and Maintenance. Each stage contributes to the successful completion of the system, with System Design serving as a crucial component. In systems design, functions and operations are described in detail, including screen layouts, business rules, process diagrams, and other documentation.

system development life cycle stages

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. Before the preliminary analysis is complete, the developer performs feasibility studies to determine whether to fix the existing system or create a new system to replace the old. A key methodology in the creation of software and applications is the systems development life cycle (SDLC). The systems development life cycle is a term used in systems engineering, information systems, and software engineering to describe a process for planning, creating, testing, and deploying an information system.

SDLC Phase 3: Systems Design

Once the system is deployed within the agency, ongoing operations and maintenance will occur that are led by agency IT staff along program leads. Periodic review of system function should occur to ensure that the system performs as designed and system updates are identified. This procedure where the care is taken for the developed product is known as maintenance. System Testing – conducts testing on a complete, integrated system to evaluate the system’s compliance with its specified requirements.

  • SDLCs can also be more specifically used by systems analysts as they develop and later implement a new information system.
  • While comparatively young, software development is a broad field encompassing many specialties, paradigms and practices.
  • This work includes the specification of interfaces between the system and its intended environment, and a comprehensive evaluation of the systems logistical, maintenance and support requirements.
  • The project manager plays a central role in this prioritization process.
  • This stage identifies the necessity whether or not to develop a new system for an organization.
  • The new system will be host in client site hosting environment and proper training will be provide by developers.

Once a “go” decision is made, the team develops a project management plan that defines the scope, deliverables, and milestones for the project. A project manager should ensure that the scope meets the business needs identified during the earlier phase and that resources (both human and financial) have been identified. Other plan elements include the process of change control, risk mitigation, and communication strategies and operations. The system development life cycle component of the course introduces aspects of methodology, the unique phases, and the roles that IT professionals play in the various stages of a project. Students learn how to collect and document requirements, translate them to application design, and trace each project artifact to its original scope. Phase 6 of the initial development state of the systems development life cycle puts the software into production and runs as needed.

stages of the software development life cycle

A software requirement specification is a most critical document that describes how a system should be developed with its all functional requirements. The final stage of the software development life cycle is maintenance and operations. This is one of the most critical stages because it’s when your hard work gets put to the test. The software development life cycle (SDLC) is the process of planning, writing, modifying, and maintaining software. Developers use the methodology as they design and write modern software for computers, cloud deployment, mobile phones, video games, and more. In SDLC, documentation is crucial, regardless of the type of model chosen for any application, and is usually done in parallel with the development process.

system development life cycle stages

Those involved in the SDLC include the c-suite executives, but it is the project/program managers, software and systems engineers, users, and the development team who handle the multi-layered process. Each project has its own level of complexity in planning and execution, and often within an organization, project managers employ numerous SDLC methods. Even when an enterprise utilizes the same methods, different project tools and techniques can differ dramatically. This includes all the specifications for software, hardware, and network requirements for the system they plan to build.

Stage 2: Analyze requirements.

During this stage of the system lifecycle, subsystems that perform the desired system functions are designed and specified in compliance with the system specification. Relevant questions include whether the newly implemented system meets requirements and achieves project goals, whether the system is usable, reliable/available, properly scaled and fault-tolerant. Process checks include review of timelines and expenses, as well as user acceptance. This is especially the case when a programmer, engineer, or database developer is called in to do important work for the developed project. These operations consist of, amongst other things, making flowcharts that ensure that the process and new system are carefully organised. Once the fresh designs are ready, the relevant team members can start working on the development of the systems.

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