SDLC: 7 Phases or Stages of the System Development Life Cycle, Models, Perks & More

There was a growing need for building large company systems, but the consumers and users in those days were far less demanding. They did not have a proper concept of what the possibilities would be on the short term. ‘Using a well illustrative diagram, list and explain all the stages involved in SDLC ‘.

systems development life cycle

The development phase marks the end of the first phase of the process. The purpose of this step is to find the scope of the problem and determine the solution. In this phase, you need to consider resources, costs, time, benefits, and other factors. Before you start the planning phase, it’s a good idea to take the time to get a good understanding of your app development lifecycle.

System Development Life Cycle: Maintenance

The System Development Life Cycle phases is a systematically structured, multi-step iterative process. SDLC can be defined as the conceptual process of developing, maintaining or altering an information system from the time that the project is started through maintenance of the completed application. There are many different SDLC models and methodologies, but each generally consists of a series of defined steps or phases. For any SDLC model that is used, information security must be integrated into the SDLC to ensure appropriate protection for the information that the system will transmit, process and store.

  • With the use of this process, we complete one phase and then begin the next.
  • The recommendations are implemented according to the test results and integration done in the previous steps.
  • Regardless of the process implemented and the tools used, all require the crucial element of documentation to support findings, close iterative phases, and to analyze success.
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  • Due to assumptions made at the beginning of a project, if an unexpected circumstance complicates the development of a system, then it may stockpile into more complications down the road.
  • Consultants at Innovative Architects will be able to quickly guide you through each of these steps, ensuring you can have your new system online as soon as possible.

Or an analysis of the end-user needs to ensure that the new system meets expectations. Perhaps most importantly, the project timeline is set during the planning phase. This can be important when developing commercial products that need to be put on the market by a specific date. It identifies whether a new system is needed to achieve a company’s strategic goals.

What is SDLC?

Michigan Tech’s SDLC includes six phases, during which defined work products and documents are created, reviewed, refined, and approved. Not every project will require that the phases be subsequently executed and may be tailored to accommodate the unique aspects of a projects. These phases are described in more detail in the following paragraphs. Establishing appropriate levels of management authority to provide timely direction, coordination, control, review, and approval of the system development project. 2.Any Forensic Laboratory employee that is involved in software development shall have the appropriate training, experience, and qualifications for the required development work.

It takes them days or even weeks to travel to a location to access the bank services. With the vision of meeting the customers needs, the bank has requested your services to examine the current system and to come up with solutions or recommendations of how the current system can be provided to meet its needs. The conceptual model that results from OOA will typically consist of a set of use cases, one or more UML class diagrams, and a number of interaction diagrams.

Additionally, this phase involves the actual installation of the newly-developed system. This step puts the project into production by moving the data and components from the old system and placing them in the new system via a direct cutover. While this can be a risky move, the cutover typically happens during off-peak hours, thus minimizing the risk. Both system analysts systems development life cycle and end-users should now see the realization of the project that has implemented changes. The fifth phase involves systems integration and system testing —normally carried out by a Quality Assurance professional—to determine if the proposed design meets the initial set of business goals. Testing may be repeated, specifically to check for errors, bugs and interoperability.

Other more elaborate versions of the SDLC specify many subphases of these three phases. For example, as the system analyst of Viti Bank, you have been tasked to examine the current information system. Customers in remote rural areas are finding difficulty to access the bank services.

What is the Software Development Life Cycle (SDLC)?

The actual development process ought to be rather simple, given the extensive planning and outlining that has already taken place. Developers will use various tools, including compilers, debuggers, and interpreters, and adhere to any coding standards established by the business. 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.

systems development life cycle

The design stage takes as its initial input the requirements identified in the approved requirements document. For each requirement, a set of one or more design elements will be produced as a result of interviews, workshops, and/or prototype efforts. By making access to scientific knowledge simple and affordable, self-development becomes attainable for everyone, including you! These operations consist of, amongst other things, making flowcharts that ensure that the process and new system are carefully organised. In the 1960s, mainframe computers hit the consumer market, and living rooms came to be filled with large systems.

Attributes of a Systems Analyst

After this phase, the software is theoretically ready for market and available to all end-users in system development life cycle phases. You can repeat the test, especially to check for errors, bugs, and interoperability. These tests are run until the end-user determines that they are acceptable.

Thanks to its framework of structured phases, those involved in the SDLC can help shape the project and manage it in a more streamlined fashion. Each has advantages and disadvantages that must be considered in order to make an informed selection. A software requirement specification, or SRS document, is frequently created by developers. This document contains all of the software, hardware, and network specifications for the system they intend to create. When working in the same location as other development teams, this will prevent them from overdrawing cash or resources. 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.

systems development life cycle

Deliver quality systems which meet or exceed customer expectations when promised and within cost estimates. 7.Tests should prove that the system complies with all design specifications and any required security measures. 4.The security issues for a development must be identified by a formal risk analysis. 3.The IT Manager, and other stakeholders as appropriate, shall review the completion of major phases of the system and provide formal sign-offs that make them personally liable and accountable for the development. System owners should validate that the alignment of RMF tasks to SDLC phases matches the practices and process standards in their own agencies.

Complementary methodologies

But before we run and take off by explaining each of the SDLC phases, let’s first define what a system is. By industry standards, a system is a combination of hardware, software, and human resources that perform the assigned tasks of collecting, processing, and displaying information. The SDLC has grown to be critical thanks to its standardized phases that manage a balancing act between costs, quality, and time to meet modern business demands, urgency, complexity, and to top it off, with tight budgets.

Without a planning phase, it is difficult to have an idea of what needs to happen and when it needs to happen. System life cycle is a project management tool that encompasses different methodologies and techniques to build a productive IT system. It can be used to increase productivity and enhance the structure of any IT company. During this stage, if there any changes need in the system then the software developers are responsible for implementing.

Regardless of the process implemented and the tools used, all require the crucial element of documentation to support findings, close iterative phases, and to analyze success. Today’s increasing demand for data and information security also factor into the overall planning, training, testing, and deployment of a system. Testing is required during the system development life cycle to ensure that applications are free of flaws and vulnerabilities. Ideally, testing should happen at every stage of the SDLC, but because it adds unacceptable delay to development processes, it is often given short shrift or postponed until the later stages of the life cycle. SDLC is also an abbreviation for Synchronous Data Link Control and software development life cycle.

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Based on the project specs and requirements, developers will select the appropriate programming code. The project manager is the overall control agent for a strong SDLC process. Agile Methods are software-based systems that provide feedback through an iterative process and include Kanban, Scrum, Extreme Programming , and Dynamic systems development method .

Operations and Maintenance

A software requirement specification is a most critical document that describes how a system should be developed with its all functional requirements. The main aim of system development life cycle in software engineering is to develop a quality-based system in a structure way. It will produce an effective solution within the given resources, budget and timelines. 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.

stages of system development life cycle

Next, you can select the best SDLC methodology or a combination of methodologies to help you address the best approach to execute the SDLC. Integral to the success of any SDLC project, the developer writes project code and integrates system elements into a cohesive end product. Developers are responsible for developing the system architecture with assistance from the System Architect, evaluating and carefully selecting the right tech stack based on unique project needs.

In this article, we have discussed 7 stages of system development life cycle. If you want to develop a new system for your organization then should develop the system using 7 stages of SDLC. System development life cycle is very much important for an organization who wants to develop and implement a system from scratch. It provides a standard and guide line to develop a system in structure way and it meets the client’s requirements.

Once the themes have been identified then there are predetermined tasks and techniques to finish the project as defined by the approved methodology of the organization. The second theme includes ways to determine the data necessary to produce the logical requirements specified by the organization. To manage and control any SDLC initiative, each project will be required to establish some degree of a work breakdown structure to capture and schedule the work necessary to complete the project.


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