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What is Software Development Life Cycle?: The Stages and Models of SDLC

In this article, you'll find what Software Development Life Cycle is and which software development models you should choose when developing your product.

So, keep reading!

What is Software Development Life Cycle?: The Stages and Models of SDLC

Software development life cycle (SDLC) is an important part of software engineering. It’s also a necessary step in software project management, and it’s crucial for developing software products. The software life cycle can be thought of as a process that includes many different steps. In this article, we’ll discuss what the software life cycle is. We will describe the stages in the software life cycle in detail and will also discuss the most commonly used software development models. So, keep reading!

What is SDLC?

Software development life cycle (SDLC) is a software engineering process. It’s also known as the software design and development life cycle, software production schedule, or software release plan. SDLC is more than just creating an executable program—it includes all of the steps that go into developing software, from idea to implementation. Software developers use this to ensure they create reliable and appropriate programs for users’ needs and requirements.

The five stages of SDLC are the planning stage, analysis stage, specification stage, design stage, and coding/programming phase, with the testing phase following soon after at each step along the way. These phases can be combined depending on the type of product being created; some software may only need one or two phases before it’s ready for release.

Software Development Life Cycle Stages

The following list provides you with an overview of common SDLC stages:

  • Requirements Gathering Phase: This stage includes requirements definition and prioritization so that developers know what they need to do for this project during the next phase (software analysis). It also involves gathering stakeholder input about how future changes may affect their business processes. The software analysis phase will use the software requirements document as a guide.
  • Requirement Analysis Phase:  This software development stage is mainly about analyzing the gathered requirements. It also includes validation of software design decisions.
  • Design Phase: This software design phase covers the architectural aspects of software products, such as how much processing power it needs, what type of interface to use (web-based or mobile), etc. The purpose is to understand the limitations and possibilities for this project so that developers can come up with a feasible solution in terms of features, technical feasibility, cost efficiency, and user experience quality expectations.
  • Implementation Planning Phase: This software development stage includes planning and assigning tasks for software developers. It also includes selecting the programming language, tools, and libraries to use during this phase of the software development life cycle.
  • Code Implementation Phase: This is where programmers write code according to a specified design to create software products with the desired features that were defined before. The purpose is to bring those ideas into reality!
  • Testing Phase: Software quality assurance experts or testers, will review software functionality after it has gone through implementation phases (software coding). They check if there are any bugs or errors, as well as testing new features. Testing may be done manually by QA engineers or automatically using an automated testing framework like Selenium WebDriver, which simulates user behavior under different conditions on a web application.
  • Deployment Planning Phase: This software development phase is mainly about preparing the software product for deployment by uploading it to a computer or web server so that customers can use it.
  • Post-implementation Maintenance and Support: After software products are deployed, developers may still be needed during this stage of SDLC to provide customer support, fix bugs (if necessary), and make updates/upgrades as part of post-release activities.

Commonly Used Software Development Models:

The most popular software design approaches used today are agile software modelling and scrum methodology, which we’ll focus on in detail here!

Waterfall Model

According to Henninger et al., the waterfall model software design approach is a software development process that consists of several software development stages. To continue the software product’s life cycle, each stage has to be completed in sequence until it reaches the deployment phase, which is the end goal for this model. This waterfall model can also be called linear software modelling because there are no loops or feedbacks from one stage to another!

Advantages: The main advantage of such a software design approach is predictability since you know what needs to happen next (in terms of tasks) at any point during a project lifecycle. You may have fewer problems with budgeting when using this type of software development model as well but…

Disadvantages: … on the other hand, the waterfall software development model is less flexible in terms of software design changes.

Agile Software Development 

The agile software design approach has been designed to improve the software development process by using iterative and incremental methods (rather than linear) and adapting to changes as soon as they happen. It works more like a feedback loop where one stage feeds into another! There are many benefits with agile software modeling, but there are also disadvantages, too.

Advantages: This software development life cycle methodology helps developers avoid risks associated with waterfall models because it encourages early detection of problems before their effects become widespread across an entire project lifecycle. The main advantage of this type of software product’s design approach is that it can help speed up time-to-market and software quality assurance requirements.

Disadvantages: One downside of this software design approach is that development tasks are less predictable due to the nature of its methods, which makes budgeting difficult! This software development model also has difficulties when it comes to integrating new features with existing ones characterized by technical debt, or having major changes in the project lifecycle.

Which Software Development Life Cycle Methodology Should You Choose?

The answer entirely depends on what your goal is for a particular project.

Do you want to minimize risks associated with waterfall models (which may slow down time-to-market)? If yes, then agile software modelling might be more suitable for your needs because one stage feeds into another, where software design changes can be done more flexibly.

If you need software quality assurance requirements to be met quickly then scrum, software development life cycle might work best for your needs because it’s made up of iterative and incremental methods, which continue until the software product is deployed.”

Choosing the right SDLC model is a make or break for your project. That is why at InvoZone, we follow best practices and work closely with clients to make sure that the right SDLC model is chosen to make your project a success. If you are not sure how to carry out software development for your product idea, contact us for a free consultation today.