System Development Life Cycle SDLC Glossary

Agile methodologies, such as XP and Scrum, focus on lightweight processes which allow for rapid changes (without necessarily following the pattern of SDLC approach) along the development cycle. Iterative methodologies, such as Rational Unified Process and dynamic systems development method, focus on limited project scope and expanding or improving products by multiple iterations. Sequential or big-design-up-front (BDUF) models, such as waterfall, focus on complete and correct planning to guide large projects and risks to successful and predictable results. Other models, such as anamorphic development, tend to focus on a form of development that is guided by project scope and adaptive iterations of feature development. The typical stages of the system development life cycle are planning and feasibility, requirements analysis, design and prototyping, software development, system testing, implementation, and maintenance.

  • Compared to other SDLC models, this one has the benefit of providing a working version early on and making it cheaper to add changes.
  • The agile model is relatively well-known, particularly in the software development industry.
  • Well, in the context of software development, it’s not too far from the truth.
  • It means that there will be less wasted effort, so a client can expect better
  • The goal of each stage is to create a product that meets or exceeds customer needs in terms of quality, usability, and performance.
  • The majority of time and money is spent on development, even when the client might not have a clear idea of what is needed.

This also equips the system with the latest technologies to face new and stronger cybersecurity threats. This move is considered complex and uncertain but the risk is minimized substantially as the cutover often takes place during off-peak hours. Both end-users and system analysts should see a refined project with all necessary changes implemented at this time. It also helps point out how those needs can be met, who will be responsible for certain parts of the project, and the timeline that should be expected.


Each phase has its own mini-plan and each phase “waterfalls” into the next. The biggest drawback of this model is that small details left incomplete can hold up the entire process. Following the best practices and/or stages of SDLC ensures the process works in a smooth, efficient, and productive way. An output artifact does not need to be completely defined to serve as input of object-oriented design; analysis and design may occur in parallel. In practice the results of one activity can feed the other in an iterative process. Think about this fundamental method of creating the apps, executables and software products we use on a daily basis.

system development life cycle meaning

The importance of the software development cycle comes first in any software development process. The quality, lead time, and budget of the output product depend on properly-constructed cycles. This will save the team efforts of programmers, testers, and PMs while increasing the survivability of the product in the conditions of real user operations.

Detailed Design Specifications

The goal of this stage is to define the full extent of the issue and generate potential answers. Costs, benefits, time, money, and system development life cycle meaning so on are all relevant factors to think about. To ensure the overall success of the project, this is the most important stage.

Mostly used for creating and delivering a wide range of ideas, this model perfectly fits the clients who don’t have a clear idea or vision of what their final product should look like. It is important that you have contingencies in place when the product is first released to market should any unforeseen issues arise. Microservices architecture, for example, makes it easy to toggle features on and off. A canary release (to a limited number of users) may be utilized if necessary.

What is the software development life cycle?

Here, you’ll have a fixed schedule and a set of clearly defined deliverables. Keeping this in mind, you can decide what SDLC method is the best suitable for your project. Agile developers prefer working in more flexible environments where collaboration is encouraged across teams rather than working in isolation. This Software Development Life Cycle approach is common for smaller projects with one or two developers. The majority of time and money is spent on development, even when the client might not have a clear idea of what is needed.

system development life cycle meaning

Customers in remote rural areas are finding difficulty to access the bank services. It takes them days or even weeks to travel to a location to access the bank services. Then based on the assessment, the software may be released as it is or with suggested enhancement in the object segment. During this stage, unit testing, integration testing, system testing, acceptance testing are done. That kind of check-in ensures that even in the highly complex environment, everything is humming along.

How to Choose the Right SDLC Methodology for Your Project

Hence, the Agile SDLC model has recently become increasingly popular and in demand. This demand can be primarily linked to the agile model’s flexibility and core principles. By its core principles, we mean adaptability, customer involvement, lean development, teamwork, time, sustainability, and testing, with its two primary elements being teamwork and time (faster delivery). So rather than creating a timeline for the project, agile breaks the project into individual deliverable ‘time-boxed’ pieces called sprints. This model prioritizes flexibility, adaptability, collaboration, communication, and quality while promoting early and continuous delivery.

system development life cycle meaning

This is particularly important for large systems, which usually are more difficult to test in the debugging stage. Defensics- Identify defects and zero-day vulnerabilities in services and protocols. Defensics is a comprehensive, versatile, automated black box fuzzer that enables organizations to efficiently and effectively discover and remediate security weaknesses in software. The best method for ensuring that all tests are run regularly and reliably, is to implement automated testing. “Let’s get this closer to what we want.” The plan almost never turns out perfect when it meets reality.

The Role of Security in the SDLC

These companies may dedicate teams of individuals to managing the software lifecycle in a way that supports the client company based on discovery and participation. The product is built and coded according to the company’s own standards. Designers follow a set of best practices and guidelines, and use the programming tools they have at their disposal to develop the product.

system development life cycle meaning

It is an organized visual representation of the software development process. It is used to define the stages and steps involved in the development of software applications, websites, and other digital products. The lifecycle of software development is as complex and varied as the products themselves. One approach to software development that has gained a lot of interest in recent years is rapid application development, or RAD. This approach uses an iterative process and relies heavily on the use of prototypes.

System Development Life Cycle (SDLC) Approaches

The design phase of a system development life cycle is all about visualization. A system
architect describes how all product components will interact with each other, defines
security levels, and outlines the way the data will be transmitted. At the same time, UI and
UX designers translate a product idea into schemes, layouts, and wireframes. In general, the
system design phase is the first important milestone in a software development process since
it marks a transition from theory to tangible deliverables. Ideation is the first among seven phases of the existing system development life cycle. Its
purpose is to define the product idea and determine what user problem the future solution
should solve.