Ultimate Guide to System Development Life Cycle

In this stage, the problem or pain the software targets is clearly defined. First, developers and other team members outline objectives for the system and draw a rough plan of how the system will work. Then, they may make use of predictive analysis and AI simulation tools at this stage to test the early-stage validity of an idea.

system design life cycle

Further, as conditions in the real world change, we need to update and advance the software to match. For example, define a nomenclature for files or define a variable naming style such as camelCase. This will help your team to produce organized and consistent code that is easier to understand but also to test during the next phase.

Benefits of a Well-Defined System Development Life Cycle

It should identify the critical technologies required to implement the mission and should consider the entire life cycle from fabrication to disposal. However, other criteria, such as time to develop and certify a unit, risk, and reliability, also are critical. This stage cannot be accomplished without addressing the roles of operators and maintainers. These contribute significantly to life cycle costs and to the system reliability.

The systems development life cycle (SDLC, also called the software development life cycle or simply the system life cycle) is a system development model. SDLC is used across the IT industry, but SDLC focuses on security when used in context of the exam. Think of “our” SDLC as the secure systems development life cycle; the security is implied. Those involved in the SDLC include the c-suite executives, but it is the project/program managers, software and systems engineers, users, and the development team who handle the multi-layered process.

Extra: Software Maintenance

The big step is creating a detailed project plan document and work breakdown structure that outlines the requirements. Enabling products are the life cycle support products and services (e.g., production, test, deployment, training, maintenance, and disposal) that facilitate the progression and use of the operational end product through its life cycle. Since the end product and its enabling products are interdependent, they are viewed as a system. Project responsibility thus extends to responsibility for acquiring services from the relevant enabling products in each life cycle phase. When a suitable enabling product does not already exist, the project that is responsible for the end product can also be responsible for creating and using the enabling product. Technical reviews of the data and analyses, including technology maturity assessments, are an important part of the decision support packages prepared for the technical team.

For example, requirements may be gathered, tracked and managed in one solution while testing use cases may take place in a completely different solution. The process of requirements definition is a recursive and iterative one that develops the stakeholders’ requirements, product requirements, and lower level product/component requirements. The requirements should enable the description of all inputs, outputs, and required relationships between inputs and outputs, including constraints, and system interactions with operators, maintainers, and other systems.

How does SDLC work?

The work plan is a living document, updated continually throughout the project. Nurses have the ability to coordinate and manage multiple diverse care situations; this affords them strong skills to manage complex projects using a Project Workplan as a primary tool. An excellent text with healthcare examples is Information Technology Project Management, by K.

system design life cycle

Each function identified is described in terms of inputs, outputs, failure modes, consequence of failure, and interface requirements. The process is repeated from the top down so that sub-functions are recognized as part of larger functional areas. Functions are arranged in a logical sequence so that any specified operational usage of the system can be traced in an end-to-end path.

SDLC Phase 6: Acceptance, Installation, and Deployment

Once testing has been completed, the system is ready for deployment or implementation. Again, your development team should have detailed deployment standards and procedures in the SRS document. If so, the testing portion of the process is just a matter of ensuring that the system meets the quality standards laid out in the SRS document. The value of having thorough design and SRS documents is that it simplifies the development stage. The less time spent developing the right solution, the sooner your business can deploy it.

  • Finally, the requirements should be defined in acceptable “shall” statements, which are complete sentences with a single “shall” per statement.
  • Literature focusing on the workflow impact of an EHR and the cultural impact on an organization are well documented by the Project Management Institute (PMI) and the Healthcare Information Management Systems Society (HIMSS).
  • Each function identified is described in terms of inputs, outputs, failure modes, consequence of failure, and interface requirements.
  • If the prior steps of the process have been well-documented, the development phase should be straightforward.
  • As noted, vendors supply essentially the same software to clients at the time of purchase.

In recent years the quality and abundance of online resources specific to clinical systems implementation have grown significantly. Due in large part to the Federal HITECH meaningful-use requirements, the PMI and HIMSS both offer training and certification processes specific to healthcare-related projects. As noted, vendors supply essentially the same software to clients at the time of purchase.


This will prevent them from overdrawing funding or resources when working at the same place as other development teams. The project manager is the overall control agent for a strong SDLC process. The system development life cycle is a straightforward approach to system development. By following clear steps jenkins integration and documenting everything thoroughly, your organization can drastically reduce the complexity and stress of system development. The Big Bang model is a less structured and more informal approach to system development. Instead, it’s characterized by rapid development with minimal planning or documentation.

system design life cycle

Verification and validation methodology requires a rigorous timeline and large amounts of resources. It is similar to the Waterfall model with the addition of comprehensive parallel testing during the early stages of the SDLC process. The Iterative model incorporates a series of smaller “waterfalls,” where manageable portions of code are carefully analyzed, tested, and delivered through repeating development cycles.

2.2 Technical Requirements Definition Guidance

It’s easy to identify and manage risks, as requirements can change between iterations. However, repeated cycles could lead to scope change and underestimation of resources. SDLC models implement checks and balances to ensure that all software is tested before being installed in greater source code. Developers clearly know the goals they need to meet and the deliverables they must achieve by a set timeline, lowering the risk of time and resources being wasted.

” 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. SDLC or the Software Development Life Cycle is a process that produces software with the highest quality and lowest cost in the shortest time possible. SDLC provides a well-structured flow of phases that help an organization to quickly produce high-quality software which is well-tested and ready for production use.


Phase 7 of the systems development life cycle assesses and ensures that the system does not become obsolete. Phase 3 of the systems development life cycle describes the desired features and operations of the system. The objective of the systems design phase is to transform all requirements into detailed specifications covering all aspects of the system. Finally, approval to progress to the development phase must be granted to complete the systems design phase.


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