System Development Life Cycle: Methodologies, Phases & Roles

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Try out Stackify’s Retrace tool for free and experience how it can help your organization at producing higher-quality software. However, regardless of the model you pick, there are a lot of tools and solutions, like Stackify’s Retrace tool, to assist you every step of the way. Developers create a version very quickly and for relatively little cost, then test and improve it through rapid and successive versions.

system development life cycle

Instead of starting with fully known requirements, project teams implement a set of software requirements, then test, evaluate and pinpoint further requirements. The System Analyst works on high-level system reviews to assess if systems and infrastructures operate effectively and efficiently. System analysts research problems, find or develop solutions, recommend a course of action, communicate and coordinate with stakeholders, choose resources, and design action plans to reach a goal and meet predefined requirements. They are experts at studying a system, process, or procedure to come up with the best solutions. The beauty of software development is that methodologies can be combined to create a hybrid solution that distinctively addresses the unique needs of a project.

Project Manager

Thus, no element which life cycle model is followed, the essential activities are contained in all life cycle models though the action may be carried out in distinct orders in different life cycle models. During any life cycle stage, more than one activity may also be carried out. 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. Testing is required during the system development life cycle to ensure that applications are free of flaws and vulnerabilities.

  • The development team gets familiar with the DDS and starts working on the code.
  • The difference
    is how these phases are structured and which one gets the largest share of the attention.
  • This is accomplished through “SRS”- Software Requirement Specification document which contains all the product requirements to be constructed and developed during the project life cycle.
  • This demand can be primarily linked to the agile model’s flexibility and core principles.

It’s linear and straightforward and requires development teams to finish one phase of the project completely before moving on to the next. In theory, all of the prior planning and outlined should make the actual development phase relatively straightforward. During this phase, QA and testing team may find some bugs/defects which they communicate to developers. This process continues until the software is bug-free, stable, and working according to the business needs of that system. To better meet the client’s requirements, a development team can also use a hybrid approach
and combine several models in the entire project. Since the product is created feature by feature, programmers can easily make changes to a
system operation if necessary.

What are system development life cycle stages?

Each iteration starts by looking ahead to potential risks and figuring out how best to avoid or mitigate them. The SDLC process involves several distinct stages, including planning, analysis, design, building, testing, deployment and maintenance. SDLC strategies have been around since the 1960s, and most of its core concepts have evolved over time. Whereas testing is traditionally a separate Software Development Life Cycle stage, teams nowadays prefer integrating security activities throughout the life cycle to create more reliable software that’s secure by design.

This phase is closely tied to documenting all the project specifications and the team usually takes sufficient time to properly document each detail for future reference. To achieve a comprehensive planning cycle, members of the project need to have a deep understanding of what tasks the future information system needs to solve. With that foundation as context, the quality and time spent on the planning phase have a direct correlation to the success of the project.

Testing and deployment

Besides the scope of the project, a client and development team
perform a feasibility study. The particular feasibility study ensures that the project is
feasible from financial, organizational, and technological points of view and sets a
deadline needed to bring the idea to reality. Ideation is the first among seven phases of the existing Its
purpose is to define the product idea and determine what user problem the future solution
should solve.

system development life cycle

DevOps professionals are acutely aware of project requirements and use them as the foundation behind every technology, architecture, and tool selection. Project managers are also responsible for keeping stakeholders in the loop of everything that’s happening with a project by engaging with them regularly and keeping communication channels open and flowing. This professional is also tasked with developing and employing best practices and standards for project documentation as well as comprehensive documentation of requirements. Additionally, project managers must also carefully evaluate the risks of the project across every phase and craft contingency plans to mitigate or reduce risks as much as possible.

System Design

The planning phase helps delineate all subsequent tasks so they can be planned and budgeted for accordingly. The SDLC phases are designed in a way that progressively develops or alters a system across its life cycle. If followed through from beginning to end, the SDLC will help deploy a fully-operational, high-quality system that meets and/or exceeds client requirements, all within the specified time and budget constraints. The iterative incremental model requires the team to quickly deploy an incomplete version of the software at the end of each development cycle.

DevOps professionals play a key role in the SDLC effort, especially in the planning and system operation components. As a multilayered role, the Project Manager is in charge of managing and overseeing the end-to-end SDLC effort, allocating resources and handling other operational tasks such as financials, planning, and more. They are typically tasked with selecting the right project management methodology with full ownership of the methodology components. By having the product emulate expected behavior on a small scale and in a controlled environment, it’s easier for developers to visualize components to ensure the software solves the needs it was designed for. Well, for any system to work as intended, it needs to be thoroughly tested and tested again until the results match the expected outcome.


As a result, each stage will have roles of project participants who will take an active role in their tasks. In this article, we will focus on the main project roles which include the project manager, analyst, architect, developer, tester, and DevOps. It’s worth noting that each project participant plays an important role across the SDLC and they all have a direct impact on the overall wellbeing of projects. Secure SDLC (or SSDLC) is a software life cycle with fully integrated security checks at every phase. Teams start thinking about security risks and measures during the first stage of the SDLC.

system development life cycle

Given the method’s complexity, there are various methodologies out there to help you manage and control the entire process. To say that the software sits at the heart of an organization’s operational ability would be an understatement. Such a solution is an organization’s spine, providing system development life cycle speed and scalability to grow and get ahead. When companies compete today, the software is an incentive to help them create a bouquet of services and products better than their competitors. Want to improve application quality and monitor application performance at every stage of the SDLC?

Software Testing

This process takes several different system development lifecycle phases, which are described below. Unfortunately, despite the mission-critical nature of the software, it doesn’t capture as much attention as required from the C-suite. Software engineers rarely have a say at the table, and software strategies are mulled over and defined two or three layers down in the hierarchy. This is mainly because software development is often seen as a cost center, something to be minimized and not prioritized.

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