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System Development Life Cycle Methodologies to Consider

This critical stage establishes the tone for the project’s overall success, which is why it is during this phase that you perform thorough research to determine resources, budget, personnel, technical aspects, and more. Given the method’s complexity, various approaches are available to manage and control the system development process. Once when the client starts using the developed systems, then the real issues come up and requirements to be solved from time to time. Once the requirement analysis is done, the next stage is to certainly represent and document the software requirements and get them accepted from the project stakeholders. Meanwhile, agile enables flexibility, while each iteration is separated by sprints and is well suited for both long and short term projects.

system development life cycle meaning

This third phase defines and designs the system’s elements, components, security levels, modules, architecture, user interfaces, and data to evaluate how the completed system will work and look. Finally, the system design undergrows detailed documentation to ensure that the system incorporates all relevant functionality of the project’s functional and operational aspects. With that in mind, Intellectsoft’s best experts have created a complete guide to the system development life cycle. You’ll learn about its core meaning and phases, major software engineering methodologies, and the most important benefits it can provide during project development. In the information systems domain, the terms SDLC and system life cycle are often used interchangeably. It has been suggested that information SDLC should not be confused with system (the delivered product) life cycle.

Benefits of the spiral model

The SDLC for information systems evolved from the basic life cycle notion for complex systems. The classic SDLC for a single system is shown in the central portion of Fig. There, it is depicted as consisting of three phases—system definition, physical design, and implementation. Other more elaborate versions of the SDLC specify many subphases of these three phases.

  • In this phase of SDLC, the actual development begins, and the programming is built.
  • They should also use automated methods to discover security problems in their code and the open-source libraries they use.
  • Centralized finance (CeFi) is defined as a financial ecosystem where centralized authorities control financial assets…
  • The V-shaped paradigm, also known as the Verification and Validation model, is an offshoot of Waterfall that stresses testing at each stage of development.
  • A tremendous amount of time was spent on the planning phase of the app’s development.

Furthermore, since the prototype building is done progressively, the cost estimation of the whole project can sometimes be easier. The NIST SDLC integrates risk management activities through the application of the NIST RMF. During this stage of the system lifecycle, subsystems that perform the desired system functions are designed and specified in compliance with the system specification. The Software Development Life Cycle is a systematic process to ensure end-product quality.


The project manager will set deadlines and time frames for each phase of the software development life cycle, ensuring the product is presented to the market in time. It can be seen that testing is a main consideration in Benington’s model of information system development. Another variation of the SDLC model, where project verification and evaluation of each phase is also required, is the V-shaped model.

system development life cycle meaning

Our developers and specialists have a track record of building innovative software solutions that perfectly fit our clients’ business goals and requirements. All of the above helps to show why the software system development life cycle meaning development life cycle is important and how it has evolved over time. Iterative, rapid application development offers so much flexibility that you run the risk of never completing your project.


As Geoffrey Elliott explains in his book, Global Business Information Technology, large corporations developed the model to help manage complex business systems that required a lot of data processing and analysis. In other words, a life cycle model maps the various activities performed on a software product from its inception to retirement. Different life cycle models may plan the necessary development activities to phases in different ways. 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.

Each risk should then be resolved using the most efficient strategy. Software testing must take place in a specialized testing environment and should test the full functionality of the system (the test environment). Results of software testing must be documented and approved by the IT Manager and the System Owner. Effective control mechanisms shall be implemented to control multiple versions of software.

SDLC Process

In the waterfall model, everything in one stage is completed before you move to the next stage. All planning gets completed before the project moves to implementation. All implementation is completed before the process moves to testing. The spiral model is a systems development lifecycle (SDLC) method used for risk management that combines the iterative development process model with elements of the Waterfall model. The spiral model is used by software engineers and is favored for large, expensive and complicated projects. 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.

In contrast, planned, linear style development can yield applications that do not meet the needs of end users even if they meet the stated requirements on paper. A secure SDLC process effectively stages privacy during development. It integrates development and security teams with a shared investment in the project to safeguard the software application without delay.

Integration and Implementation Stage – How Will We Use It?

Once a system has been stabilized through testing, SDLC ensures that proper training is prepared and performed before transitioning the system to support staff and end users. Training usually covers operational training for support staff as well as end-user training. The design stage takes as its input the requirements already defined. In systems design, functions and operations are described in detail, including screen layouts, business rules, process diagrams, and other documentation. Modular design reduces complexity and allows the outputs to describe the system as a collection of subsystems. At this step, desired features and operations are detailed, including screen layouts, business rules, process diagrams, pseudocode, and other deliverables.

system development life cycle meaning

By framing these questions around SDLC he was better able to hone in on his ultimate solution and to build the right tools for the right users. My friend wanted to start the a company and reached out to me and others for guidance. I advised him to use SDLC to first perform a requirements analysis even though his ambitions were quite large. Before writing content the author must first define the requirements, plan what will be written, and then actually put pen to paper.

Phase 5: Deploy

A configuration management system shall be implemented during development and implementation. The Forensic Laboratory configuration management process is defined in Chapter 7, Section 7.4.5. Any Forensic Laboratory employee that is involved in software development shall have the appropriate training, experience, and qualifications for the required development work. These standards should be used within the context of the Forensic Laboratory’s Secure System Development Life Cycle.

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