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What is Software Development Life-Cycle?
The software development life cycle (SDLC) is a process that describes the stages that a software project goes through from inception to completion. SDLC is a series of steps and activities that help your team to create, test, and deploy software.
Software Development Life Cycle Steps

The software development life cycle is a method to manage the software development process. The process is a series of stages and these stages are:
The software development life cycle (SDLC) is a process that describes the stages that a software project goes through from inception to completion. It consists of a series of steps and activities that are performed by the team to create, test, and deploy software.
There are many different models and methodologies for SDLC, but they all have the same basic phases:
Planning
The planning phase is the very beginning of the project. In this phase, you define you project goals, assemble your team and gather the requirements after studying them.
Design
The design phase is when you design your solution and create the architecture along with the UI/UX of the software
Development
The development phase is when the developers start writing the code using the best programming language for the software to serve its purpose and run as smooth as possible for your users
Testing
The testing phase is the phase where you test the code for bugs and errors.
If developers find any bugs, they work on fixing it moreover provide a better solution for the software to run in a prime condition and maximize it.
Deployment
The deployment phase is when you launch your software to the public and they start using it.
This is where you keep an eye on your software while analysing it to see how you can improve your software to better solve your users’ problems.
The SDLC is a process that repeats itself. It is a structured development process with defined phases.
those phases work together on repeat to deliver the end product which is software that is made for a specific purpose or solve a problem.
Software Development Life Cycle Models

There are many different models and methodologies for SDLC, but they all have the same basic phases: planning, design, development, testing, and deployment. Each phase has its own set of activities that must be completed in order to move on to the next phase.
Software development life cycle (SDLC) is a process that software engineers follow to design and develop a software product. The SDLC models are the different ways to structure the process of developing software.
There are six major SDLC models, which include waterfall, spiral, agile, phased development, incremental development and rapid prototyping. These have been developed over time to address the shortcomings of their predecessors.
Here are 4 of the most popular models:
SDLC Waterfall model
This model is one of the earliest models for software development and it was one of the most popular models in the 1990s. It focuses on a linear sequence of steps, with each step being completed before moving onto the next. The waterfall model is not as popular anymore because it can lead to issues such as wasted time, money, and effort if there are any problems at any point in the process.
The waterfall model is a sequential software development process that is used in software engineering. It is one of the most best models for managing the process of creating and maintaining software. The waterfall model has been criticized for being too rigid, but it does provide benefits such as clarity, simplicity, and controllability.
SDLC Agile model
This type of software development emphasizes an iterative approach that allows your feedback to be incorporated into future stages. It also has shorter cycles that allow for quicker delivery of products or services.
The agile software development model is based on iterative and incremental processes that allow for quick feedback while taking care of adjustments and delivery rate.
Benefits of Agile Model
Agile is one of the most popular development methodologies. It is a software development approach that focuses on customer collaboration, frequent delivery of working product, and team empowerment.
The Agile model has many benefits for the SDLC process. For example, it helps teams to focus on the customer requirements and to build products that are valuable from day one. It also helps them to deliver more value with less time and effort.
SDLC Kanban model
The kanban model is a simple yet effective way to manage work flow. Toyota was the inventor of this model. The model revolves around simplicity, visibility, and flexibility.
The model was designed so that each phase of the process could be measured and reviewed on an individual basis, rather than having to wait until the end of development to see how well things went.
The kanban board consists of three columns: “To Do”, “Doing”, and “Done”. The first column represents tasks that are waiting to be started, the second column represents tasks that are being worked on, and the third column represents completed tasks.
SDLC Lean methodology

The Lean methodology is a system of production that focuses on eliminating waste. Along with, maximizing value. Toyota Manufacturing System was first to introduce the lean methodology and since then it was the core methodology to various industries around the world. The Lean methodology is based on five principles:
1) Value – eliminate waste to create greater value for customers.
2) Flow – smooth flow of product from process to process with no interruptions or waiting time for work-in-progress.
3) Pull – suppliers deliver materials only when they are needed by downstream processes
4) Simplicity – remove all unnecessary steps and complexity from processes.
5) Respect people – respect people’s knowledge, ideas, and creativity.
Software Development Lifecycle (SDLC) is a process that is used in the development of software. Those most popular models involve different stages and focus on the development of the software in less time and cost while focusing on maximum quality
The Lean methodology also provides a framework for delivering high quality software on time and within budget. The benefits of using lean model are:
- Improved communication
- Reduced risk
- Increased agility
SDLC DevOps

DevOps is a method of integrating different departments within an organization to enable faster and more efficient development, deployment, and testing. It also provides a higher quality of service to the end user.
DevOps gives you rapid feedback loops to detect any potential problems early on in the process. Meanwhile, providing minimal disruption to users.
DevOps can bring benefits to the software development lifecycle. It was created in 2009 by Patrick Debois, John Willis and Andrew Shafer to improve communication and collaboration between software developers, operations professionals and IT operations staff.
The DevOps methodology has its origins in agile software development. The goal of DevOps is to create a culture where continuous integration and continuous delivery are the norm.
SDLC Spiral
The Spiral is a five-phase model of the process of change, developed by Dr. James O. Prochaska and Dr. Carlo DiClemente, who based their work on the Trans theoretical model of behavioral change.
Spiral is an acronym for the 5 stages:
Stabilization (Precontemplation)
Preparation (Contemplation)
Action (Preparation)
Maintenance (Action)
Termination (Termination/Maintenance).
The spiral model can be used to help manage risk by allowing for changes in requirements to be implemented throughout a project. It also helps with cost management, since it only requires an initial investment rather than one large one. The model also allows for more creativity, since it gives developers time to think about how they want their software to work without being under pressure from deadlines and budget constraints.
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