What is Systems Development Life Cycle? Definition from WhatIs com

By December 1, 2021Software development

System Development Life Cycle does not exist when the software is released. Developers need to enter maintenance mode and perform the activities necessary to resolve issues reported by end-users. The testing is continued until the end-user finds it acceptable and it may be repeated to check for interoperability, errors, and bugs. Additionally, validation and verification are also done during this phase ensuring the program’s successful completion. This stage ensures the system stays usable and relevant by regularly replacing outdated hardware, inspecting performance, improving software, and implementing new updates so all standards are met. This also equips the system with the latest technologies to face new and stronger cybersecurity threats.

New versions of a software project are produced at the end of each phase to catch potential errors and allow developers to constantly improve the end product by the time it is ready for market. The Hunter Business School Web Application Design and Development program has a class that teaches the system development Life cycle. The clinical leadership of an organization is highly involved in the establishment of an EHR committee structure.


According to Schwalbe (2016), a project should have a well-defined objective resulting in a unique product, service, or result. BAE said in a statement that the funding will cover development work up to 2028, enabling the company to begin detailed design and start to procure long-lead items. An existing system is replaced by a new system that consists of replaced components or modules to ensure that it meets new requirements. SAD is mostly used to find a balance between requirements at a higher level. The seventh phases of the Systems Development Life Cycle (SDLC) is often ignored or missed. This phase consists of maintenance and performing regular necessary updates.

  • T’s important that the software overall ends up meeting the quality standards that were previously defined in the SRS document.
  • When a resolution is reached, the resolution is documented in the issues list and the status is updated.
  • Many organisations opt to have the system tested elsewhere first, in a special testing environment.
  • The agile methodology prioritizes fast and ongoing release cycles, utilizing small but incremental changes between releases.
  • Establishing the evaluation criteria early in the process supports the successful management philosophy of beginning with the end in mind.

Developers use the methodology as they design and write modern software for computers, cloud deployment, mobile phones, video games, and more. SDLC is also an abbreviation for Synchronous Data Link Control and software development life cycle. Software development life cycle is a very similar process to systems development life cycle, but it focuses exclusively on the development life cycle of software. 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.


Interfaces between subsystems are defined, as well as overall test and evaluation requirements.[18] At the completion of this stage, a development specification is produced that is sufficient to perform detailed design and development. The correct use of the System Development Life Cycle has a large system development phases number of benefits. The implementation of a lifecycle for a system opens up a lot of possibilities, including the ability to plan and organise structured phases and smart goals beforehand. The development phase marks the end of the first stage of the Systems Development Life Cycle (SDLC).

In other words, to ensure the right action at the right time and for the right reasons, the SDLC will force developers to follow every step they need to take. This methodology saves developers the risk of spending months or even years on a process that ends up failing because of a small mistake at an early stage. Instead, the team members are expected to work directly with customers to understand the software goals and suggest solutions in a fast and streamlined way. While the team is focused on delivering consistent product functionality at each iteration, there is an opportunity to continually improve and redistribute the overall backlog of the product. New or changed backlog items can be scheduled for the next iteration, allowing for changes to be made over several weeks. QA experts are also involved in the discussion, meaning that they can set their own requirements and, if necessary, adjust the process.

Iterative Model

It helps to define the problem and scope of any existing systems, as well as determine the objectives for their new systems. 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. This may involve training users, deploying hardware, and loading information from the prior system.

system development phases

Larger systems may require longer maintenance stages compared to smaller systems. Different modules or designs will be integrated into the primary source code through developer efforts, usually by leveraging training environments to detect further errors or defects. Statement of the Objective The first step in conducting a feasibility study is to state the objectives for the proposed system. The objectives identify the “end product” by defining what the EHR will do for the end users. Melnyk and Fineout-Overholt (2015) define evidencebased practice (EBP) as a problem-solving approach that incorporates the best available scientific evidence, clinicians’ expertise, and patients’ preferences and values.

Systems development life cycle: The different stages

Theoretically, this model helps teams to address small issues as they arise rather than missing them until later, more complex stages of a project. The agile model is relatively well-known, particularly in the software development industry. The Big Bang model is incredibly flexible and doesn’t follow a rigorous process or procedure. It’s mostly used to develop broad ideas when the customer or client isn’t sure what they want. This can include handling residual bugs that were not able to be patched before launch or resolving new issues that crop up due to user reports.

system development phases

The second phase of the system development life cycle is also the point where system analysis takes place and the functional requirements of the project are also considered. Phase 3 defines the necessary specifications, operations, and features that will satisfy all functional requirements of the proposed system. It’s where end users can discuss and identify their specific business information needs for the application. During this phase, users will consider the important components, networking capabilities, and procedures to accomplish the project’s primary objectives. At the end of the development phase, the systems might look fully operational, but it is important that they are first tested before going live. This irons out any kinks in the systems to make sure that it is working as perfectly as it should be.

Develop career skills and credentials to stand out

Without a planning phase, it is difficult to have an idea of what needs to happen and when it needs to happen. If you haven’t yet started your journey as a software developer, you might ask yourself, “Is software development for me? ” Here are some signs that this career path might be one that you will enjoy.

system development phases

Before releasing the mockups into final production, you’ll need to test it to ensure it is free of bugs and errors. You’ll also need to manage how the system will integrate into existing systems, software, and processes. Once you’ve got your design plans in front of you, it’s time for wireframing and mockups. This step builds upon the planning stage, building out the tasks you need to do in the work breakdown schedule. There are plenty of tools available, such as Adobe XD or InVision, that make this process much easier than ever before. In IT, the term “life cycle” was first used in the 1950s and 1960s to describe the stages involved in developing a new computer system, but it is now commonly used to refer to all stages in the production of any type of software [1].

SDLC Phase 1: Preliminary Analysis

The point of a good system is to marry the two needs at the most efficient and cost-effective manner. In the requirement analysis phase, the analyst should draw up a list of everything needed from the company to develop the best system, all the while bearing in mind what resources are actually available. One of the fundamental aspects of business systems analysis is to consider the value and the efficiency of the systems within a company.

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