The System Development Life Cycle (SDLC) is a multistep process organized methodically. This process is used to model or offer a framework for technical and non-technical activities to deliver a quality system that meets or exceeds a business's expectations or manage decision-making progression.
Topics: system development life cycle
Are you an IT project manager who’s planning to develop a project? If not now, do you ever see yourself managing a team in the future? Look no further, we're here to help. Read on as we discuss the most frequently asked questions regarding the system development life cycle.
System development is a crucial aspect of any modern business. Of course, building the system in-house is always an option. But, let’s say you want professional customized systems that allow your business to grow and upscale more efficiently. If you don’t have the time to build and manage a team of your own, working with a system development company that already has experienced experts is an option with many advantages. Here are several reasons why people choose to work with an established company.
Each phase of the SDLC methodology has its own processes and deliverables that feed into the next phase. The entire methodology is divided into seven system development life cycle stages:
- Requirement collection and analysis
- Feasibility or Requirements Analysis
- Design and Prototyping
- Software Development (Coding)
- Software Testing
- Operations and Maintenance
Stage 1: Requirement Collection and AnalysisThe requirement stage is conducted by a senior team member, with additional input from stakeholders, the sales department, and domain experts within the industry. This information is used to conduct a product feasibility study in the operational, technical, and economical areas. During this stage, the team is given a clear picture of the project’s scope, along with its anticipated issues and opportunities.
Stage 2: Feasibility or Requirements AnalysisOnce the requirement stage is complete, it’s time to define and document software needs. This phase is conducted with the help of the Software Requirement Specification (SRS) document that includes everything that must be developed and designed during the project’s life cycle.
The five main types of feasibility checks are:
- Economic: Can the project be completed within the set budget?
- Legal: Does the project comply with cyber laws and other regulations?
- Operation: Can the team create operations outlined by the stakeholder or client?
- Technical: Can the current computer system support the software?
- Schedule: Can the project be completed within the given time frame?
Stage 3: Design and PrototypingIn this phase, the software specifications need to be turned into a design plan or a prototype. The product architects need to create a plan called Design Document Specification (DDS), which the stakeholders have to review and give feedback on. Based on certain parameters, such as risk assessment, budget and time constraints, design modularity, and robustness, the best product design approach is selected.
Three types of design documents are developed at this stage:
- Low-Level Design (LLD): This is a component-level design process based on HLD that follows a step-by-step refinement process. It goes into the separate modules and features for each program.
- High-Level Design (HLD): This is a general system design that consists of a brief description of each module. This indicates the interface relationship and dependencies between them, an outline about their functionality, database tables and complete architecture diagrams.
- Detailed-Level Design (DLD): This is the most detailed technical document. It describes user stories, state transitions, logical sequences, error processing algorithms, and more.
Stage 4: Software Development StageIt’s now time to turn everything into a working code. This is the earliest phase in which the final product starts to take shape. Developers are most involved during this stage. They work alongside the product owner and software testers to ensure everything runs smoothly.
Stage 5: Software Testing
The software testing phase puts testers to work. The testing team will check for code quality to ensure it meets all the requirements for optimal functionality. If they find any bugs, they relay them to the developers, who then fix the bugs and send back the software for re-testing. The process continues until the software works properly.
Related Content: 4 Best Practices For Faster Software Development And Testing
Stage 6: Installation/DeploymentOnce testing is over, the final deployment process starts. At this stage, the product owners work with the marketing team to produce marketing material and documentation, such as user manuals, guides, and more.
Stage 7: Operations and MaintenanceDuring this phase, the main focus is to ensure that the software continues to meet all requirements and perform as per the specifications that were outlined in the first phase.
The following three activities occur during the maintenance phase:
- Developers watch software for bugs. If they find one, they create a bug report. A sign that everything is working well during this time is when developers can identify and resolve the issue as quickly as possible.
- Developers upgrade the application to the newest version of the software.
- Developers add new features to the existing software to enhance its functionality.
Which SDLC Stage Is the Most Important?Among all system development life cycle stages, have you ever wondered which is the most important? For Bydrec, every single phase is crucial, so nothing should be left out or rushed. All SDLC stages should be valued equally.
However, many software development experts suggest that the requirement collection and analysis stage is the most important aspect of SDLC. This is when the project team begins to understand what the stakeholders expect from the project. The project team must first understand the stakeholder’s needs because this information is critical to developing a software product that meets their expectations and needs.
Software Development Life Cycle Models
Now that you have a better understanding of how SDLC stages work, here are some SDLC models that you can utilize for your project:
What happens to the system development life cycle (SDLC) when everyone works from home? The COVID-19 pandemic is wreaking havoc on businesses everywhere. Software developers need to adjust to the new normal.
Topics: system development life cycle