What Is Sdlc? Phases Of Software Development & Models

Integration, system, security, and user acceptance testing is conducted during this phase as well. The user, with those responsible for quality assurance, validates that the functional requirements are met by the newly developed or modified system. Given the complexity of the method, there are numerous methodologies out there that help manage and control the system development process. Among these methodologies, we can find Waterfall, Agile, rapid prototyping, incremental, and more.

system development life cycle sdlc

This solves much of the problems of older applications that were arcane and cumbersome to use. Agile seeks to release software cycles quickly, to respond to a changing market. It can also lead to a project going off-track by relying too heavily on customer feedback. Tasks often hold up the development process, such as waiting for test results or compiling code so an application can run. SDLC can anticipate these delays so that developers can be tasked with other duties.


The first stage of new software development will be to gather all relevant information from stakeholders and analyze this information to determine what will be feasible. We’ve reviewed many variations of software development lifecycle models. The following six-phase framework seems to be the most straightforward.

A system development life cycle helps to lower the complexity of developing a system from scratch. It is important to have an SDLC in place as it helps to transform the idea of a project into a functional and completely operational structure. In addition to covering the technical aspects of system development, SDLC helps with process development, change management, user experience, and policies.

Initiation Phase

Completely defined in 1971, the term originated in the 1960s when mainframe computers filled entire rooms and a pressing need developed to define processes and equipment centered on building large business systems. In those days, teams were small, centralized, and users were ‘less’ demanding. This type of scenario meant that there was not a true need for refined methodologies to drive the life cycle of system development. system development life cycle sdlc However, technology has evolved, systems have become increasingly complex, and users have become accustomed to well-functioning technology. Models and frameworks have been developed to guide companies through an organized system development life cycle. Today, the traditional approaches to technology system development have been adjusted to meet the ever-changing, complex needs of each unique organization and their users.

Which SDLC model is best?

Agile is the best SDLC methodology and also one of the most used SDLC in the tech industry as per the annual State of Agile report. At RnF Technologies, Agile is the most loved software development life cycle model.

Report on key metrics and get real-time visibility into work as it happens with roll-up reports, dashboards, and automated workflows built to keep your team connected and informed. The V-Shaped Model is an adaptation of Waterfall that has testing as an integral part to close each phase. Many of the methods are considered inflexible, and some suffer from outdated processes. “Let’s get this closer to what we want.” The plan almost never turns out perfect when it meets reality.

Systems Development Life Cycle (sdlc)

SDLC is crucial because it breaks up the long and tedious life cycle of software development. By and large, evaluating each part of the development is much easier and it helps programmers concurrently work on every stage. The spiral model emphasizes the need to go back and reiterate earlier stages a number of times as the project progresses. It’s actually a series of short waterfall cycles, each system development life cycle sdlc producing an early prototype representing a part of the entire project. This approach helps demonstrate a proof of concept early in the cycle, and it more accurately reflects the disorderly, even chaotic evolution of technology. Identify and assign the roles and responsibilities of all involved parties, including functional and technical managers, throughout the system development life cycle.

  • Architecture, and business architecture, and relies heavily on concepts such as partitioning, interfaces, personae and roles, and deployment/operational modeling to arrive at a high-level system description.
  • The importance of a central source control repository cannot be overstated.
  • Few people in the modern computing world would use a strict waterfall model for their SDLC as many modern methodologies have superseded this thinking.
  • On the other hand, removing unnecessary stages provides teams with multiple benefits, such as early system deployment or flexibility to solve unplanned problems down the road.
  • In high-maturity enterprises, this phase is almost invisible; software is deployed the instant it is ready.

This stage is preliminary and pertains to the step where you gather valuable input from every stakeholder, including industry experts, sales specialists, and other stakeholders. It’s essential during this stage to identify specific weaknesses of the existing system that the new software aims to resolve. A software application typically undergoes several development lifecycles, corresponding to its creation and subsequent upgrades. Such projects continue until the underlying technology ages to the point where it is system development life cycle sdlc no longer economical to invest in upgrades and the application is considered for either continued as-is operation or retirement. The System Analyst is an IT professional who works on the high-level system review to assess is systems, infrastructures, and computer systems function effectively and efficiently. System analysts research problems, discover solutions, recommend a course of action, coordinate with stakeholders, select resources, and design action plans to reach a goal and meet pre-defined requirements.

Project Managing The System Development Life Cycle

One such tool is Smartsheet, a work management and automation platform that enables enterprises and teams to work better. This article will provide an in-depth analysis of the history, definition, phases, benefits, and disadvantages, along with solutions that support the system development life cycle. ” This phase of the SDLC starts by turning the software specifications into a design plan called the Design Specification. All stakeholders then review this plan and offer feedback and suggestions. It’s crucial to have a plan for collecting and incorporating stakeholder input into this document. Failure at this stage will almost certainly result in cost overruns at best and the total collapse of the project at worst.

Despite that fact, Waterfall became a very common, even standard methodology for large projects around the world. Business stakeholders should be engaged regularly, to ensure that their expectations are being met. Architects, Development teams, and Product Managers work with the SMEs to document the business processes that need to be automated through software. The output of this phase in a Waterfall project is usually a document that lists these requirements.


Leave a Comment

Your email address will not be published.

Scroll to Top